Respuesta :
The final probability is the weighted average of the playing probabilities calculated over the possible weather options:
P(john practices cello; given that it rains) * P(it rains) +
P(john practices cello; given that it does not rain) * P(it does not rain) =
0.6 * 0.7 + 0.4 * 0.3 = 0.54
The probability is 54%
The probability that John will practice his cello is 54%.
Given information:
If it rains tomorrow, the probability is 0.6. If it does not rain tomorrow, there is only a 0.4 chance. And, the chance of rain tomorrow is 70%.
Calculation of probability:
= 0.6 (0.7) + 0.4 (0.3)
= 0.54
= 54%
Learn more about the probability here: https://brainly.com/question/3974756