Three ferryloads are needed to carry 150 people across a river. How many people will be carried on 4 ferryloads?

If three loaves of bread are consumed by 9 people, how many people will consume 9 loaves of bread?

The mass of a silver coin is 10.0 g. A person can carry a load of 40 kg. How many persons will be required to carry one Avogadro number of such coins?

In how many ways can 8 people sit around a table?

Cystic fibrosis is an autosomal recessive disease . In an island having a population of 200 people, 98 people suffer from cystic fibrosis. How many people are carrier of this disease ?

In a party 15 people shake their hands with each other. How many times did the hand-shakes take place?

Estimate the fastest bit rate capable of being carried by light of wavelength 1.3 mu m . How many phone calls could be carried at this bit rate ? Band width of optical fibre = 2 GHz.

Estimate the fastest bit rate capable of being carried by light of wavelength 1.3 mu m . How many phone calls could be carried at this bit rate ? Band width of optical fibre = 2 GHz.

Suppose a crew of 43 people are used to steer a ship. There are 3 among them who can steer and we need only 1 person to steer. Out of the remaining 40 people. 8 can row only on one side and 3 people can only row on the other side. How many ways can the crew be arranged in so that there are 20 rowers on each side of the ship?

How many Faradays are needed to reduce 1 mole of MnO_(4)^(-) to Mn^(2+) ?

One haemoglobin carries how many molecules of O_(2) ?