Out of 100 pears bought from the market, 20 are unripe. What is the probability that the pear picked is ripe?
A
\(\frac{1}{5}\)
B
\(\frac{4}{5}\)
C
\(\frac{1}{4}\)
D
\(\frac{5}{4}\)
Verified Correct Answer: B.
Step-by-Step Mathematical Solution
Total number of pears = 100
Number of unripe pears = 20
Number of ripe pears = 100 - 20 = 80.
Probability that a randomly picked pear is ripe
\(P(\text{ripe}) = \frac{\text{Number of ripe pears}}{\text{Total number of pears}} = \frac{80}{100} = \frac{4}{5}\) = 0.8
Source: Myschool Past Questions Archive (Record #78172)