If a coin is tossed 7 times what is the probability that it will land either heads 7 times or tails 7 times? Choose the most appropriate option: A) 1/4 B) 1/8 C) 1/16 D) 1/32 E) 1/64
The probability of 7 heads is (1/2)^7 = 1/128   The probability of 7 tails is (1/2)^7 = 1/128   The probability of 7 heads or 7 tails is 1/128 + 1/128 = 1/64   The answer is 1/64.
<result>E</result>
If a coin is tossed 7 times what is the probability that it will land either heads 7 times or tails 7 times?