Two dice are rolled simultaneously and counts are added.

A student argues that ‘there are 11 possible outcomes 2.3.4.5.6.7.8.9.10.11 and12. Therefore, each of them has a probability Do you agree with this argument? Justify your answer.

A lot consists of 144 ball pens of which 20 are defective and the others are good. The shopkeeper draws one pen at random and gives it to Sudha. What is the probability that

She will not buy it?

Two dice are rolled simultaneously and counts are added.

completes the table given below:

A game consists of tossing a one-rupee coin 3 times and noting its outcome each time. Deskhitha wins if all the tosses give the same result i.e. three heads or three tails. And loses otherwise. Calculate the probability that she will lose the game.

A die is thrown twice. What is the probability that

5 will not come up either time?

[Hint : Throwing a die twice and throwing two dice simultaneously are treated as the same experiment ].