GKB_Q98
Q- At a party,every1 shake hands with everybody else.There r 66 handshakes
How many people r there?
Ans- With two people, there is one handshake.
With three people, there are three handshakes.
With four people, there are six handshakes.
In general, with n+1 people, the number of handshakes is the sum of the first n consecutive numbers: 1+2+3+...+n.
Since this sum is n(n+1)/2,
we need to solve the equation n(n+1)/2 = 66.
This is the quadratic equation n2+n-132 = 0.
Solving for n, we obtain 11 as the answer and deduce that there were 12 people at the party.
Q- At a party,every1 shake hands with everybody else.There r 66 handshakes
How many people r there?
Ans- With two people, there is one handshake.
With three people, there are three handshakes.
With four people, there are six handshakes.
In general, with n+1 people, the number of handshakes is the sum of the first n consecutive numbers: 1+2+3+...+n.
Since this sum is n(n+1)/2,
we need to solve the equation n(n+1)/2 = 66.
This is the quadratic equation n2+n-132 = 0.
Solving for n, we obtain 11 as the answer and deduce that there were 12 people at the party.
I NEED THE SOLUTION FOR Q115... I AM UNABLE TO FIND IT
ReplyDeleteTHANK YOU
OK Ankur...
ReplyDeleteI'll post it's solution soon as soon it possible.
Follow the blog for more solutions.
Thank you