The mean of four consecutive even numbers is 15.the greatest of these numbers is a1.the least of these numbers is a2.

Let x be the first even number. Then adding 2 consecutively gives us the subsequent even numbers. That is

From the question, the mean of these four numbers is 15. That is;

Multiply both sides by 4 to obtain,

Divide both sides by 4 to obtain,

30.5*10=350$

you have to multiply the number without the decimal point then add it later but if its tenn u must move the place value of the decimal point 1 to the right.