Simple probability trees

Front

Jim and Sue each take a driving test.

The probability that Jim will pass the driving test is 0.7

What is the probability he fails the test?

Back

0.3

Front

Probability that Sue will pass the driving test is 0.6. What is the probability she fails the test?

Back

0.4

Front

What is the probability that both Jim and Sue pass the test?

Back

0.42

Front

What is the probability that only one of Jim or Sue will pass the driving test?

Back

0.46

Front

Terri has 7 pens in a box.

2 of the pens are blue, 5 of the pens are red.

Terri takes a random pen from the box.

What is the probability that she picks a blue pen?

(Give answer as a fraction)

Back

2/7

Tags

CCSS.7.SP.C.7B

Front

What is the probability that Terri picks a red pen from a box of 7 pens (2 blue, 5 red)?

Back

5/7

Tags

CCSS.7.SP.C.8B

Front

Terri has 7 pens in a box.

2 of the pens are blue, 5 of the pens are red.

Terri takes a random a pen from the box and puts it back in the box.

What is the probability that she picks a blue pen the second time ?

(Give answer as a fraction)

Back

2/7

Front

Terri has 7 pens in a box.

2 of the pens are blue, 5 of the pens are red.

Terri takes a random a pen from the box and puts it back in the box.

What is the probability that she picks a red pen the second time ?

(Give answer as a fraction)

Back

5/7

Front

Find the probability that Terri takes one pen of each colour from the box? (Give answer as a fraction)

Back

20/49

Front

What is the probability that Tim picks a blue counter from a bag with 3 red counters and 4 blue counters? (Give answer as a fraction)

Back

4/7

Tags

CCSS.7.SP.C.8B