In a golf club, 90% of members are men and the remaining are women. The average height of men is 170 cm and the average height of women is 165 cm. Find the average height of the club members.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 169.5.
Let the total number of members in a club be 100
90% of members are men = 90% of 100 = 90
Number of women in a club = 100 - 90 = 10
We know that,
Average = Sum of observations/Number of observations
The sum of men's height = 170 × 90 = 15300
The sum of the women's height = 165 × 10 = 1650
Average height = (15300 + 1650)/100 = 169.5