Question

4 children each have some beads, the mean number of beads is 8 Rajiv brings some more beads. The mean number of 5 children is now 9 what is the numberx of beads Rajiv brings

Answer 1

• The number of beads Rajiv brings is: 13

Explanation:

• Make a plan:

In this question, we need to use the formula of means to solve the. We can set the number of beads Rajiv brings as X, and use the formula of mean to get the total number of beads that the Four(4) children have and the total number of beads that the Five(5) children have.

• Solve the problem:

Four(4) children each have some beads, the mean number of beads is: 8

• We can get the total number of beads the Four(4) children have:

4 * 8 = 32

• Rajiv brings some more beads:

We set the number of beads Rajiv brings as:

x, so the total number of beads that the Five(5) children have is:

32 + x

The mean number of the Five(5) children is now: 9

• We can get the total number of beads that the Five(5) children have:

5 * 9 = 45

• Now, we have the equation:

32 + x = 45

x + 32 = 45

- 32 = -32

x = 13

By solving the above equation, you can get:

x = 13

• Hence, The number of beads Rajiv brings is:

13

Hope this helps!