The probability of a table-tennis ball being
defective is 1/10. About how many balls would
be defective in a case of 725 table-tennis balls?
A) 1
B) 7
C) 73***
D) 80
yes
To find the approximate number of defective table-tennis balls in a case of 725 balls, you can use the concept of probability.
The probability of a table-tennis ball being defective is given as 1/10.
To calculate the approximate number of defective balls, you can multiply the probability by the total number of balls in the case:
Probability of being defective = 1/10
Number of table-tennis balls in the case = 725
Approximate number of defective balls = Probability of being defective * Number of balls
Approximate number of defective balls = (1/10) * 725
Approximate number of defective balls = 72.5
Rounding this to the nearest whole number, the approximate number of defective balls would be 73.
Therefore, the correct answer is C) 73.