Question

a bag contains 30 marbles. 8 are pink, 11 are blue, 4 are yellow and 7 are purple. Calculate the probability of randomly selecting a marble that is not blue .

Answer 1

In order to find the probability of a marble not being blue, we need to find how many marbles are not blue.

To do so, we just need to sum the number of pink, yellow and purple marbles:

`8+4+7=19`

Now, to find the probability, we just need to divide the number of non-blue marbles by the total number of marbles.

`(19)/(30)=0.6333=63.33\text{\%}`