If a child flips a coin five times in a row, what is the probability that she will receive at least one head and one tail?	Choose the correct choice from the following options:  A) 3/4  B) 11/12  C) 15/16  D) 31/32  E) 63/64
The coin is flipped 5 times in a row.   So there are  2*2*2*2*2= 
<gadget id="calculator"> 2*2*2*2*2</gadget>
<output>32</output>
32 different outcomes possible such as HHTHH, HTHHT, TTHTH etc   Look for the reverse probability - when will there is no heads or no tails?   There will be no heads when you get all tails. There is only 1 such case TTTTT   There will be no tails when you get all heads. There is again only 1 such case HHHHH   So, out of 32, there are only 2 cases in which there are either no heads or no tails. In all other 30 cases, there is at least one heads and at least one tails.   Required probability= 30/32 = 15/16   Answer (15/16)
<result>C</result>
If a child flips a coin five times in a row, what is the probability that she will receive at least one head and one tail?