Question
Rahim, tosses two different coins simultaneously. Find the probability of getting at least one tail.
✓
Answer
Rahim tosses two coins simultaneously. The sample space of the experiment is $\{ HH , HT , TH$ and $TT\}$
Total number of outcomes $=4$
Number of outcomes which are in favour of getting at least one tail on tossing the two coins $=\{ HT , TH , TT \}$
Number of outcomes in favour of getting at least one tail $= 3$
Probability of getting at least one tail on tossing the two coins
$=\frac{\text { Number of favourable outcomes }}{\text { Total possible outcomes }}$
$=\frac{3}{4}$
Total number of outcomes $=4$
Number of outcomes which are in favour of getting at least one tail on tossing the two coins $=\{ HT , TH , TT \}$
Number of outcomes in favour of getting at least one tail $= 3$
Probability of getting at least one tail on tossing the two coins
$=\frac{\text { Number of favourable outcomes }}{\text { Total possible outcomes }}$
$=\frac{3}{4}$
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