Question

three coins are tossed simultaneously. Find the probability of getting
1.at least 1 head
2.almost 2 heads​

Answer 1

at least one head = 1- probably of not head

= 1- 1/8

= 7/8

atmost most two head = 1- probably of all three head= 1-(1/2)*(1/2)*(1/2)

=1-1/8

=7/8