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At 4 months of age, some babies are able to roll over. In a study done...

At 4 months of age, some babies are able to roll over. In a study done of 50 4-month old children, the following results were found. Roll Over Not Roll Over Total Males 13 9 22 Females 20 8 28 Total 33 17 50 Calculate the probability that a randomly chosen baby is a male, given that the baby can roll over. (Enter your probability as a fraction.)

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Answer #1

Solution :

Roll Over  Not Roll Over Total

Males 13 9 22

Females   20 8 28

Total   33 17 50

The probability that a randomly chosen baby is a male, given that the baby can roll over is,

= 13 / 33

Probability = 13 / 33

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