There is a bag with only milk and dark chocolates. The probability of randomly choosing a dark chocolate is
3
8
.
There are 27 dark chocolates in the bag and each is equally likely to be chosen.
Work out how many milk chocolates there must be.

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.