Question

When all three coins are tossed simultaneously

1) find all the possible outcomes

2) find the probability of getting no head

Answer 1

(1)
If we toss three coins then the possible outcomes are as follows:


(H,H,H) (H,H,T),(H,T,H),(T,H,H),(H,T,T),(T,H,T),(T,T,H) & (T,T,T)

(2)
Probability of getting no heads

Let A be event of getting no heads
A={(T,T,T)}
n(A)=1
n(S)=8
p(A)=n(A)/n(S)
=1/8