A student says that if you throw a die, it will show up 1 or not 1. Therefore, the probability of getting 1 and
the probability of getting ‘not 1’ each is equal to . Isthis correct? Give reasons.
Solution. Probability: probability means possibility. It is a branch of mathematics that deals with the occurrence of a random event. The value is expressed from zero to one.
Here total cases = 6
Number of favourable cases in getting 1 = 1
Probability of getting
Number of favourable cases 'not 1' = 5 (2, 3, 4, 5, 6)
Probability of not 1 =
Hence they are not equal to