An experiment consists of tossing 3 fair (not weighted) coins, except one of the 3 coins has a head on both sides. Compute the probability of obtaining less than 2 talls.
The probability of obtaining less than 2 tails is $\square$
(Type an integer or a simplified fraction.)
Answer
\(\boxed{0.875}\) is the final answer. This is the probability of obtaining less than 2 tails when tossing 3 coins, one of which has heads on both sides.
Step 1 ：An experiment consists of tossing 3 fair (not weighted) coins, except one of the 3 coins has a head on both sides. We are asked to compute the probability of obtaining less than 2 tails.
Step 2 ：The total number of outcomes is 8.
Step 3 ：The number of favorable outcomes, which is the number of outcomes with less than 2 tails, is 7.
Step 4 ：We calculate the probability by dividing the number of favorable outcomes by the total number of outcomes. This gives us a probability of \( \frac{7}{8} = 0.875 \).
Step 5 ：\(\boxed{0.875}\) is the final answer. This is the probability of obtaining less than 2 tails when tossing 3 coins, one of which has heads on both sides.
