Respuesta :
Answer:
21
Step-by-step explanation:
Let's first get the probability that he had in rolling a 3 when he rolled the die 90 times. The formula for probability is times he got a 3 / times he rolled the die.
He got a 3 14 times, and he rolled 90 times, so the proportion is 14/90.
If we want to extend this proportion to when he rolls 135 times, we just multiply.
135 * 14/90 = 21 expected times he rolls a 3