Q.4. Given that, There are 22 males & 27 females. In total, there are 49 people. Handshakes between Males : The number of ways males can shake hands with each other is given by (22! / 2!(22-2)!), which is the combination of 22 males taken 2 at a time. i.e, (22! / 2!(22-2)!) = (22*21) / 2 = 11*21 = 231 Handshakes between Females : Similarly, the number of ways females can shake hands with each other is (27! / 2!(27-2)!), i.e, (27! / 2!(27-2)!) = (27*26) / 2 = 13*27 = 351 Handshakes between Male and Female : The number of ways a male can shake hands with a female is no. of males * no. of females. i.e, 22*27 = 594 So, The total number of handshakes possible is 231+351+594 = 1176 Handshakes
WRONG ANSWER TO THE QUESTION :- Two people, decide to meet at a beach between 1 pm to 2 pm. He waits for 15 minutes and then leaves feeling betrayed and similarly she waits for 15 minutes after she arrives. So what's the probability that they meet? The correct ans to the question is 7/16 . please check your concepts before lecturing .
Thank you for this video. I am following you guys from the third year of my college. I hope I get a place in any company and make my parents proud. I am looking forward to getting a place in the IT sector.
Q.2. To determine how many 9-digit numbers are possible using the digits 1, 2, 3, 4, and 5, and are divisible by four, we need to consider the divisibility rule for four. The last two digits of a number need to be divisible by 4 for the entire number to be divisible by 4. Following are the possibilities for the last two digits: For the unit's place, we can use any of the digits: 1, 2, 3, 4, 5 (5 possibilities). For the ten's place, any of the digits can be used: 1, 2, 3, 4, 5 (5 possibilities). So, the total number of possibilities for the last two digits is 5×5=25. Now, for the remaining 7 digits (the leading digits), each of them can be any of the digits: 1, 2, 3, 4, 5 (5 possibilities for each digit). Therefore, the total number of 9-digit numbers divisible by 4, using the digits 1, 2, 3, 4, and 5, with repetition allowed, is 25 × 5^7. So, The correct answer is 5^7.
Q.6. Given that, AB is the height of the building = 9 metres. We have to find out the height of the tower, CD. The problem says that the angle of elevation of the top of tower CD from the top of the building AB is 30 degrees, and the angle of depression from the top of the tower to the foot of the tower is 60 degrees. For the angle of elevation, 30 degree :- tan (30 deg) = CD / AB => 1 / root 3 = CD / 9 So, CD = 9 / root 3 For the angle of depression, 60 degree :- tan (60 deg) = (AB + CD) / AB => root 3 = (9 + CD) / 9 => CD + 9 = 9*root 3 => CD = 9*root 3 - 9 Now, Simplifying the expressions for CD, 9 / root 3 = (9*root 3 )/ 3 = 3*root 3 Hence, The height of the tower CD is 3*root 3 meters.
Launching TCS Crash Course, Checkout the registration link in the description!
Q.4. Given that, There are 22 males & 27 females. In total, there are 49 people.
Handshakes between Males : The number of ways males can shake hands with each other is given by (22! / 2!(22-2)!), which is the combination of 22 males taken 2 at a time. i.e,
(22! / 2!(22-2)!) = (22*21) / 2 = 11*21 = 231
Handshakes between Females : Similarly, the number of ways females can shake hands with each other is (27! / 2!(27-2)!), i.e,
(27! / 2!(27-2)!) = (27*26) / 2 = 13*27 = 351
Handshakes between Male and Female : The number of ways a male can shake hands with a female is no. of males * no. of females. i.e,
22*27 = 594
So, The total number of handshakes possible is 231+351+594 = 1176 Handshakes
WRONG ANSWER TO THE QUESTION :- Two people, decide to meet at a beach between 1 pm to 2 pm. He waits for 15 minutes and then leaves feeling betrayed and similarly she waits for 15 minutes after she arrives. So what's the probability that they meet?
The correct ans to the question is 7/16 .
please check your concepts before lecturing .
thats not an option though?
Thank you for this video. I am following you guys from the third year of my college. I hope I get a place in any company and make my parents proud.
I am looking forward to getting a place in the IT sector.
Sir , Q.4 how to you got 11 value sir
Tcs smart hiring k liye coding part attempt karna zaroori hai kya??
30:59
Q.2. To determine how many 9-digit numbers are possible using the digits 1, 2, 3, 4, and 5, and are divisible by four, we need to consider the divisibility rule for four.
The last two digits of a number need to be divisible by 4 for the entire number to be divisible by 4.
Following are the possibilities for the last two digits:
For the unit's place, we can use any of the digits: 1, 2, 3, 4, 5 (5 possibilities).
For the ten's place, any of the digits can be used: 1, 2, 3, 4, 5 (5 possibilities).
So, the total number of possibilities for the last two digits is 5×5=25.
Now, for the remaining 7 digits (the leading digits), each of them can be any of the digits: 1, 2, 3, 4, 5 (5 possibilities for each digit).
Therefore, the total number of 9-digit numbers divisible by 4, using the digits 1, 2, 3, 4, and 5, with repetition allowed, is 25 × 5^7.
So, The correct answer is 5^7.
wrong you count twice
Kuch bhi bolte ho bhai kisiko samaj nhi aaya
Q.6. Given that, AB is the height of the building = 9 metres.
We have to find out the height of the tower, CD.
The problem says that the angle of elevation of the top of tower CD from the top of the building AB is 30 degrees, and the angle of depression from the top of the tower to the foot of the tower is 60 degrees.
For the angle of elevation, 30 degree :-
tan (30 deg) = CD / AB
=> 1 / root 3 = CD / 9
So, CD = 9 / root 3
For the angle of depression, 60 degree :-
tan (60 deg) = (AB + CD) / AB
=> root 3 = (9 + CD) / 9
=> CD + 9 = 9*root 3
=> CD = 9*root 3 - 9
Now, Simplifying the expressions for CD, 9 / root 3 = (9*root 3 )/ 3 = 3*root 3
Hence, The height of the tower CD is 3*root 3 meters.
6:30
Tomorrow we have the smart hiring aptitude test, prior that is there any videos from your side before attending the test?
We have a complete playlist for the same, kindly check that out.
88.57
88.57
88.56
88.57