Three unbiased coins are tossed simultaneously ,find the probability o

1.	Three unbiased coins are tossed simultaneously ,find the probability of obtaining at least 2 heads and at most 2 heads.
Answer» probability of at least 2 heads = 4/8 = 1/2and probability of at most 2 heads= 7/8 Thnku ji When 3 unbaised coins are tossed, the total number of events = 8 They are {HHH, HHT, HTH, THH, TTH, THT, HTT, TTT} (1) Number of favourable events (getting at least two heads) = 4 Probability of getting at least two heads = 4/8 = 1/2 (2) At most two heads That is no head or one head or 2 heads Probability of getting at most two heads = 7/8 Thnku ji u too

Three unbiased coins are tossed simultaneously ,find the probability of obtaining at least 2 heads and at most 2 heads.

Answer»

probability of at least 2 heads = 4/8 = 1/2and probability of at most 2 heads= 7/8

Thnku ji

When 3 unbaised coins are tossed, the total number of events = 8

They are {HHH, HHT, HTH, THH, TTH, THT, HTT, TTT}

(1) Number of favourable events (getting at least two heads) = 4

Probability of getting at least two heads = 4/8 = 1/2

(2) At most two heads

That is no head or one head or 2 heads

Probability of getting at most two heads = 7/8

Thnku ji u too