APFIVE Calculating Joint Probability
Of 1,000 test-takers, 70 chose ‘answer ©’ and also scored between 80 and 100. Based on this data, what is the joint probability that a randomly selected test-taker chose ‘answer ©’ and scored between 80 and 100?
A
The joint probability is $$\frac{100}{1000} = 0.10$$.
B
The joint probability is $$\frac{140}{1000} = 0.14$$.
C
The joint probability is $$\frac{350}{1000} = 0.35$$.
D
The joint probability is $$\frac{70}{1000} = 0.07$$.
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