the probability of tossing a coin four times

Question

the probability of tossing a four times

 

A. 0.5

B. 0.375

C. 0.25

D. 0.0625

Answer 1

Is there more to this question?

 

The probability of getting HHHH = (1/2)(1/2)(1/2)(1/2) = 1/16

                                    TTTT = 1/16

The probability of getting exactly 1 H or 1 T    HHHT, HHTH, HTHH, THHH = 4/16

                                                                 TTTH, TTHT, THTT, HTTT = 4/16

The probability of getting exact 2h = the probability of getting exactly 2t 

 

The probability of getting exactly 3H or 3T is the same as getting 1T or 1H