Q1.There are two stores, A and B, which sell t-shirts on the market. Store A has stock of n red and 2 black t-shirts, and store B has stock of 2 red and n black t-shirts. One of the stores is selected at random and two t-shirts are purchased without replacement from that store. Given that both the t-shirts purchased are red, the probability that they were purchased from store A is 76​. Find the value of n.
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Q1
6 Apr 2026
Q1.There are two stores, A and B, which sell t-shirts on the market. Store A has stock of n red and 2 black t-shirts, and store B has stock of 2 red and n black t-shirts. One of the stores is selected at random and two t-shirts are purchased without replacement from that store. Given that both the t-shirts purchased are red, the probability that they were purchased from store A is 76​. Find the value of n.
