**Probability ncert solutions Chapter 15 Exercise 15.1 Question 25**

**25.** Which of the following arguments are correct and which are not correct? Give reasons for your answer.

(i) If two coins are tossed simultaneously there are three possible outcomes- two heads, two tails or one of each. Therefore, for each of these outcomes, the probability is

(ii) If a die is thrown, there are two possible outcomes- an odd number or an even number. Therefore, the probability of getting an odd number is

**Solution:**

**(i)** Incorrect

If two coins are tossed simultaneously there are 4 possible outcomes.

HH (We get heads on both the coins)

HT (Heads on the first coin and tails on the second coin)

TH (Tails on the first coin and heads on the second coin)

TT (Tails on both the coins)

Therefore, Probability of each outcomes is equal to

**(ii) **Correct

With a single throw of a die, we have 6 possible outcomes.

1, 2, 3, 4, 5, or 6.

There are 3 even numbers and 3 odd numbers from 1 to 6.

Therefore, the probability of getting an even or odd number is equal to