Three coins are tossed simultaneously 200 times with the following frequencies of different outcomes:

 

Outcome	3 heads	2 heads	1 head	No head
Frequency	23	72	77	28

If the three coins are simultaneously tossed again, compute the probability of 2 heads coming up.

Solution:

Number of times 2 heads come up = 72

Total number of times the coins were tossed = 200

∴, the probability of 2 heads coming up = 72/200 = 9/25