The probability of getting at least 2 heads when a pair of coin is tossed four times is:

Question

Statistics

Answer 1

Coin pair

H :stands for head

T:stands for tail

sample space S

S = {HHHH, HHHT, HHTH, HHTT, HTHH, HTHT, HTTH, HTTT, THHH, THHT, THTH, THTT, TTHH, TTHT, TTTH, TTTT}

 S = 16

The case of getting at least two heads:C

C= {HHHH, HHHT, HHTH, HHTT, HTHH, HTHT, HTTH, THHH, THHT, THTH, TTHH}

C = 11

The probability of getting at least 2 heads when a pair of coin is tossed four times =c/s=11/16.