Question

Brenda is a metalsmith who makes custom signs out of different types of metals. She sold 10

signs this week in the following metals:
copper, silver, brass, silver, aluminum, copper, brass, copper, silver, copper
Based on the data, estimate how many of the next 40 signs Brenda sells will be made of
brass.
If necessary, round your answer to the nearest whole number.

Answer 1

8

Explanation:

Brenda sold 2 brass signs of the 10 signs she sold this week. You want an estimate of the number of brass signs she will sell out of the next 40.

Proportion

We expect the proportion of brass signs to remain the same, so the number (x) of brass signs in the next 40 signs is expected to be ...

x/40 = 2/10

x = 40(2/10) = 8

We estimate Brenda will sell 8 brass signs out of the next 40 signs she sells.

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