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Yakvenalex [24]
2 years ago
8

Alisha bought a collection of 500 old pennies. she chose 20 pennies from the collection and recorded their dates. seven pennies

had dates earlier than 1980. what is the best estimate of the percent of pennies in alisha's collection that have dates earlier than 1980? enter your answer in the box.
Mathematics
2 answers:
natima [27]2 years ago
4 0

Answer:  The best estimate of the percentage is 35%.

Step-by-step explanation:  Given that Alisha bought a collection of 500 old pennies. She chose 20 pennies from the collection, recorded their dates and note that seven pennies had dates earlier than 1980.

We are to find the best estimate of the percent of pennies in Alisha's collection that have dates earlier than 1980.

Since, 7 out of 20 pennies from the collection had dates earlier than 1980.

So, the percentage of of pennies in Alisha's collection that have dates earlier than 1980 will be

\dfrac{7}{20}\times 100\%=7\times 5\%=35\%.

Thus, the best estimate of the percentage is 35%.

Naddik [55]2 years ago
3 0
35%
Using the experimental probability of 7 pennies (a success) out of 20(number of trials) can give us an estimate of  7/20 or 0.035 or 35%
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