A coin is tossed, then a number 1-10 is chosen at random. what is the probability of getting heads then a number less than 4?

Probability of sequences can be calculated by multiplying the chance of the first event by the chance of the second, and so on.

The probability of tossing a coin and getting heads is 50%, or 0.5, and the probability of selecting a number less than four from 1-10 is 40%, or 0.4.

The overall probability can then be expressed as:

0.5 x 0.4 = 0.2 or 20%

There is a twenty percent chance that a heads would be tossed and a number less than four selected.

Well, there is a 1 in 10 (10%) chance of getting any number:

There are three numbers less than 4:

There is a 30% chance.