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A carton contains 20 shirts , of which q are made of pure cotton. After 4 more pure cotton shirts are added to the carton, the probability of drawing a pure cotton shirt becomes 3/4 , find the value of q.

User ZeroSkillz
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1 Answer

1 vote

Answer:

The value of q = 11

Explanation:

Number of pure cotton shirts =
(4+q)/(20)

Probability of drawing pure cotton shirts =
(4+q)/(20) =
(3)/(4)

Substituting the above problem = 4(4 + q) = 3 x 20

= 16 + 4q = 60

= 4q = 60 - 16 = 44

= q =
(44)/(4)

∴ q = 11

User Jensengar
by
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