Two coins are tossed once. Find the probability of getting:
i) 2 heads
ii) at least 1 tail
[3 MARKS]

Open in App

Solution

Sample space: 1 Mark
Each subpart: 1 Mark each

Sample sapce is {HH, HT, TH, TT}
P (E) $= \frac{N u m b e r o f f a v o u r a b l e o u t c o m e s}{T o t a l n u m b e r o f p o s s i b l e o u t c o m e s}$
i) The number of favourable outcomes i.e. two heads = 1
P(2 heads) $= \frac{1}{4}$

ii) The number of favourable outcomes i.e. at least 1 tail = 3
P(at least 1 tail) $= \frac{3}{4}$

Suggest Corrections

Similar questions

2

1

3

2

2

2

3

Two coins are tossed once. Find the probability of

(i) Getting 2 heads

(ii) Getting at least 1 head

(iii) Getting no head

(iv) Getting 1 head and 1 tail

Three coins are tossed once. Find the probability of getting

(i) 3 heads (ii) 2 heads (iii) at least 2 heads

(iv) at most 2 heads (v) no head (vi) 3 tails

(vii) exactly two tails (viii) no tail (ix) at most two tails.

Two coins are tossed simultaneously once. Find the probability of getting at least one head and one tail.

Join BYJU'S Learning Program