If a coin has an equal probability of landing heads up or tails up each time it is flipped , what is the probability that the coin will land heads up exactly once in 3 consecutive flips ?	Choices
A) 0.125 B) 0.25 C) 0.75 D) 0.375 E) 0.666
Total number of ways in which H or T can appear in 3 tosses of coin is   = 2 * 2 * 2= 
<gadget id="calculator">2 * 2 * 2</gadget>
<output>8</output>
8 ways   For 2 T and 1 H   Thus probability is= P(HTT) + P(TTH) + P(THT)   = 1/8 + 1/8 + 1/8   = 3/8= 
<gadget id="calculator">3/8</gadget>
<output>3/8 = around 0.375</output>
.375   Answer : 0.375
<result>D</result>
If a coin has an equal probability of landing heads up or tails up each time it is flipped , what is the probability that the coin will land heads up exactly once in 3 consecutive flips ?