Question

if two coins are tossed then find the probability of at least one tails and at most one head​

Answer 1

When two coins are tossed the results are (HH,HT,TH,TT)

Total no. of outcomes =4

1) Exactly one head = only two cases are (HT,TH)

=42=21

2) At least one tail = There are three cases (HT,TH,TT)

=43

3) No. tail = only one case (HH) =41

4) Atmost one head =three cases (HT,TH,TT)

=43.

Answer 2

When two coins are tossed the results are (HH,HT,TH,TT)

Total no. of outcomes =4

1) Exactly one head = only two cases are (HT,TH)

= 2/4= 1/2

2) At least one tail = There are three cases (HT,TH,TT)

= 3/4

3) No. tail = only one case (HH)

=1/4

4) Atmost one head =three cases (HT,TH,TT)

= 3/4

hope it help