Question

If one die is rolled, then find the probability of the event that the number on the upper face is prime.

Solution:

‘S’ is the sample space.

S = {1, 2, 3, 4, 5, 6}

∴ n(S) = `square`

Event A: Prime number on the upper face.

A = (2, 3, 5)

∴ n(A) = `square`

∴ P(A) = `(n(A))/square`

∴ P(A) = `square/6`

= `1/2`

Answer 1

‘S’ is the sample space.

S = {1, 2, 3, 4, 5, 6}

∴ n(S) = \[\boxed{6}\]

Event A: Prime number on the upper face.

A = (2, 3, 5)

∴ n(A) = \[\boxed{3}\]

∴ P(A) = \[\frac{n(A)}{\boxed{n(S)}}\]

∴ P(A) = \[\frac{\boxed{3}}{6}\]

= `1/2`