shannon found a stack of 100 collectible fantasy horse cards in her desk that she had forgotten about. she…
shannon found a stack of 100 collectible fantasy horse cards in her desk that she had forgotten about. she randomly looked at 20 cards and got 8 centaur, 7 pegasus, and 5 unicorn cards. based on the data, estimate how many unicorn cards are in the stack. if necessary, round your answer to the nearest whole number. unicorn cards
Answer
Explanation:
Step1: Calculate the proportion of unicorn cards in the sample
The proportion of unicorn cards in the sample of 20 cards is $\frac{5}{20}=\frac{1}{4}$.
Step2: Estimate the number of unicorn cards in the whole stack
Multiply the proportion by the total number of cards in the stack. So the estimated number of unicorn cards is $\frac{1}{4}\times100 = 25$.
Answer:
25