H H H H H T H T H T H H T T H T H T H T T T T T BECAUSE DOIN

Sample Math Question: Three coins are tossed up in the air, What is the probability that two of them wi land heads and one will land tails? A. 0 B. 1/8 C. 1/4 D. 3/8

Solution

As this is a problem based on a coin tossed thrice

Therefore total number of outcomes will be 2^3 ie.8

Therefore in denominator it will be 8.

Now number of favorable outcomes will be

3 factorial divided by 2 factorial

6/2 = 3

This problem can be reduced to word problem

We need to find number of possible arrangements of words formed by H, H, T

This will be 6/2 ie 3

Hence the required probability is 3/8. ANSWER