Question

5 coins are tossed together. What is the probability of getting exactly 3 tails?

A 5/32 Correct Answer Incorrect Answer
B 5/16 Correct Answer Incorrect Answer
C 35/64 Correct Answer Incorrect Answer
D 25/62 Correct Answer Incorrect Answer
E None of these Correct Answer Incorrect Answer

Solution

If ‘n’ fair coins are tossed, Total number of outcomes in the sample space = 2n The probability of getting exactly ‘r’ number of heads when ‘n’ coins are tossed =nCr/ 2n Therefore, probability = 5C3/25 = 5/16

Practice Next
×
×