Question

Four coins are tossed simultaneously. what is the probability of getting (i) 2 heads (ii) at least 2 heads (iii) at most 2 heads (iv) plot the distribution curve.

Answer 1

There are 2%5E4 or 16 of them.
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HHHH HHHT HHTH HHTT
HTHH HTHT HTTH HTTT
THHH THHT THTH THTT
TTHH TTHT TTTH TTTT
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1) No heads TTTT P=1%2F16
2) No tails HHHH P=1%2F16
3) Exactly 2 heads HHTT HTHT HTTH THHT THTH TTHH P=6%2F16=3%2F8

Answer 2

Answer:

i) 1 time

2) 6 times

3) 1 time