Probability Tree

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. What is the probability that she picks a red pen? (Give answer as a fraction)

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)

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)

Find the probability that Terri takes one pen of each colour from the box?

(Give answer as a fraction)

Tim puts 3 red counters and 4 blue counters in a bag.

He takes at random a counter from the bag.

He writes down the colour of the counter.

He puts the counter in the bag again.

What is the probability that he picks a blue counter the second time?

(Give answer as a fraction)

Tim puts 3 red counters and 4 blue counters in a bag.

He takes at random a counter from the bag.

He writes down the colour of the counter.

He puts the counter in the bag again.

What is the probability that he picks a red counter the second time?

(Give answer as a fraction)

What is the probability that Tim picks out two red counters? (give answer as a fraction)

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?

Jim and Sue each take a driving test.

The probability that Sue will pass the driving test is 0.6

What is the probability he fails the test?

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