Probability Problems

In this session let me help you on Probability problems. Since we had studied enough on all about probability now let me help you with sample problems on probability.

Example:

At a car park there are 100 vehicles, 60 of which are cars, 30 are vans and the remainder are lorries. If every vehicle is equally likely to leave, find the probability of:

a) van leaving first.

b) lorry leaving first.

c) car leaving second if either a lorry or van had left first.

Solution: This will also help us on radical calculator

a) Let S be the sample space and A be the event of a van leaving first.

n(S) = 100

n(A) = 30

Probability of a van leaving first:

b) Let B be the event of a lorry leaving first.

n(B) = 100 – 60 – 30 = 10

Probability of a lorry leaving first:

c) If either a lorry or van had left first, then there would be 99 vehicles remaining, 60 of which are cars. Let T be the sample space and C be the event of a car leaving.

n(T) = 99

n(C) = 60

Probability of a car leaving after a lorry or van has left:

keep reading may be in the next session let me help you on solve Proportions Problems