A bag has mint and toffee sweets. Two sweets are taken at random without replacement. What is the probability that both are mint?
Answer and explanation
Correct answer: C.
- Step 1: First sweet mint: .
- Step 2: One mint is gone, leaving mint in sweets: .
- Step 3: Multiply: .
Answer
.
Why not the others: : This is , which assumes the first sweet is replaced. : This is the probability for the first sweet only. : This is the probability that both sweets are toffee, .
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