MBA Exam

A fair coin is tossed n number of times. If the probability that head occurs 7 times is equal to the probability that head occurs 15 times. What is the value of n?

1) 48
2) 24
3) 22
4) 12
5) 32

Read Solution (Total 1)

ans 22, 15+7=22
probability will be same for occurring head and non-occurring head when a coin tossed.
11 years agoHelpfull: Yes(0) No(0)

MBA Other Question

Consider a combination lock consisting of 3 buttons that can be pressed in any combination (including multiple buttons at a time), but in such a way that each number is pressed exactly once. Then the total number of possible combination locks with 3 buttons is. . .(Pls explain)

1) 7
2) 9
3) 10
4) 13
Find the number of integer pairs (x,y) that satisfy the equation :x y = 2( x + y )

1) 4
2) 5
3) 6
4) 7