a coffee shop recorded the drinks that were recently sold. mochas 1 macchiatos 3 americanos 5 lattes 7…
a coffee shop recorded the drinks that were recently sold. mochas 1 macchiatos 3 americanos 5 lattes 7 espressos 4 considering this data, how many of the next 15 drinks sold would you expect to be espressos? espressos
Answer
Explanation:
Step1: Calculate total drinks sold
$1 + 3+5 + 7+4=20$
Step2: Calculate probability of selling an espresso
The number of espressos sold is 4. Probability $P=\frac{4}{20}=\frac{1}{5}$
Step3: Calculate expected number of espressos in 15 drinks
Expected number $E = 15\times\frac{1}{5}=3$
Answer:
3