Hi

Three coins are tossed

(a) Determine the number of points in the sample space:  = 8

(b) Construct a tree diagram and list the sample space

HHH, HHT,HTH, THH, TTT, TTH, HTT, THT

(c) P( least two heads are tossed)= P(2) + P(3) =  3/8 + 1/8 = 4/8 = 1/2

(d) P(≤ four head is tossed) = 1 = P(0) + P(1) + P(2) + P(3) 

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