Calculating Joint Probability

Question

Of 1,000 test-takers, 70 chose 'answer (c)' and also scored between 80 and 100. Based on this data, what is the joint probability that a randomly selected test-taker chose 'answer (c)' and scored between 80 and 100?

Accepted Answer

The joint probability is $$\frac{70}{1000} = 0.07$$.

Answer

The joint probability is $$\frac{100}{1000} = 0.10$$.

Answer

The joint probability is $$\frac{350}{1000} = 0.35$$.

Answer

The joint probability is $$\frac{140}{1000} = 0.14$$.

Rank	User	Correct Count	Attempt Count	Total Time	Score
#1	h62018675	2	2	0m 00s	200
#2	jonesg	1	1	0m 37s	63
#3	halllais304	1	1	1m 44s	-4
#4	abygail.gonzalez69	1	1	41m 42s	-2,402

Calculating Joint Probability

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