Question

three coins are tossed together.find the probability of getting-a)exactly two heads b)at least two heads c)no head d)at least one head and one tail.

Answer 1

a) 3
b) 4
c) 1
d) 6
because the outcomes would be
HHH
HHT
HTH
HTT
THH
THT
TTH
TTT
Here T represents tails and H represents Heads.

Answer 2

Answer:

Step-by-step explanation:

The total outcomes are

HHH

TTT

HTT

HHT

THH

TTH

HTH

THT

a) Exactly two heads- HHT,THH,HTH

P(getting exact two heads) - 3/8

b) At least two heads- HHH,HHT,THH,THT

P(getting at least two heads- 4/8=1/2

c) No head - TTT

P(getting no head) - 1/8

d) At least one head and one tail- HTT,TTH,HHT,THH,HTH,THT

P(getting at least one head and one tail) 6/8=3/4

.....