If it snows tomorrow, the probability is 0.5 that John will practice his trumpet. If it does not snow tomorrow, there is only a 0.4 chance that John will practice. Suppose the chance of snow tomorrow is 60%. What is the probability that Justin will practice soccer this evening?

The probability that John will practice soccer is given by the product of the probability that it won't snow and the probability that he'll practice soccer. This is shown below:

practice soccer = (1 - 0.6)*0.4

practice soccer = 0.4*0.4

practice soccer = 0.16

The probability that Justin will practice soccer this evening is 16%,

If it snows ​tomorrow, the probability is 0.5 that John will practice his trumpet. If it does not snow ​tomorrow, there is only a 0.4 chance that John will practice. Suppose the chance of snow tomorrow is 60​%. What is the probability that Justin will practice soccer this evening?

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If it snows tomorrow, the probability is 0.5 that John will practice his trumpet. If it does not snow tomorrow, there is only a 0.4 chance that John will practice. Suppose the chance of snow tomorrow is 60%. What is the probability that Justin will practice soccer this evening?