Practice questions available in **McGraw Hill Math Grade 6 Answer Key PDF** **Lesson 25.6 Calculating Probabilities** will engage students and is a great way of informal assessment.

## McGraw-Hill Math Grade 6 Answer Key Lesson 25.6 Calculating Probabilities

**Exercises**

**CALCULATE**

Question 1.

If there are 20 boys in your class of 35 students, what is the probability that your teacher will call on a girl student?

Answer:

Total number of students = 35

Number of boys = 20

Number of girls = 35 – 20 = 15

P(G) = 15/35 = 3/7

Thus the probability that your teacher will call on a girl student is 3/7

Question 2.

There are 12 green apples in the bag of 40 apples. What is the probability that you will get a green apple when you reach into the bag?

Answer:

Total number of apples = 40

Number of green apples = 12

P(G) = 12/40 = 3/10

Thus the probability that you will get a green apple when you reach into the bag is 3/10.

Question 3.

You decide to watch a movie. There are 3 scary movies in a stack of 12 DVDs. What is the probability that you will pick a scary movie?

Answer:

Given,

You decide to watch a movie. There are 3 scary movies in a stack of 12 DVDs.

Total number of DVDs = 12

Number of scary movies = 3

P(S) = 3/12 = 1/4

Thus the probability that you will pick a scary movie is 1/4

Question 4.

John knows that once a week his mother makes steamed spinach. What is the probability that when John has dinner tonight that he will not have spinach?

Answer:

John knows that once a week his mother makes steamed spinach.

Number of days in a week = 7

John knows that once a week his mother makes steamed spinach.

Number of days that will not have spinach = 6

The probability that when John has dinner tonight that he will not have spinach = 6/7

Question 5.

The department of motor vehicles noted that among passenger vehicles, there are 6 SUVs registered for every 12 cars registered in the state. What is the probability that the first vehicle you see on the street will be an SUV?

Answer:

Given,

The department of motor vehicles noted that among passenger vehicles, there are 6 SUVs registered for every 12 cars registered in the state.

The probability that the first vehicle you see on the street will be an SUV = 6/12 = 1/2

Question 6.

In any given crowd of 20 people, 17 will be carrying cell phones, and 3 of those cell phones will have low batteries. What is the probability that when you ask a random person to borrow a cell phone, you will get one with a low battery?

Answer:

Total number of people = 20

Number of people carrying cell phones = 17

Number of people who have low battery cell phones = 3

The probability that when you ask a random person to borrow a cell phone, you will get one with a low battery = 3/20

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