Bank Exam Government Jobs Exams Numerical Ability Probability

Q. A coin is tossed 5 times. what is the probability that head appears an odd number of times

Option
A)2/5
B)1/5
C)1/2
D)4/25

Read Solution (Total 4)

for odd number of times either head can appear 1 time , 3 times or 5 times
so for 1 time there are 5c1 ways
for 3 times there are 5c3 ways
for 5 times there are 5c5 ways
total there are 5c1+5c3+5c5=16 ways
so there are 16 favorable outcomes
total outcomes= 2*2*2*2*2=32
probability= 16/32=1/2
so, option c
10 years agoHelpfull: Yes(14) No(0)

Two occurence are possible. HEAD or TAIL and coin is tossed 5 times which is odd number so head probability is 1/5
10 years agoHelpfull: Yes(0) No(3)
3/5-1/5=/5
9 years agoHelpfull: Yes(0) No(0)
Two occurence are possible. HEAD or TAIL and coin is tossed 5 times which is odd number so head probability is 1/5
7 years agoHelpfull: Yes(0) No(0)

Bank Exam Other Question

Q. The average of 3 numbers is 135.The largest number is 180 and the difference between the others is 25.the smallest number is:

Option
A)130
B)125
C)120
D)100 Q. A man bought a television and a dvd player. If he sold the television at a loss of 5% and the player at a gain of 10%, he neither gains nor loses from the transaction. But if he sells the television at a gain of 20% and the player at a loss of 10% he gains Rs3000. Find the cost price of the television.

Please help me solve this question in easy way.