Answer:
To find the probability of the next drink being an espresso, we need to know the total number of drinks sold.
In this case, the total number of drinks sold is:
3 cappuccinos + 7 espresso drinks = 10 drinks
The probability of the next drink being an espresso can be calculated by dividing the number of espresso drinks sold by the total number of drinks sold:
Probability of next drink being an espresso = Number of espresso drinks sold / Total number of drinks sold
Probability of next drink being an espresso = 7/10
Probability of next drink being an espresso = 0.7 or 70%
Therefore, the probability of the next drink being an espresso is 0.7 or 70%.