2) There were 36 students in a class & thui average
height was 4 felt binches. At the end of the year 34
students with an average height of 3 feet 3.5 inches
left the class. Mover 6 new students
got
class, their average height being 4 feet quiches
The
aurrage height in feet of the students currently in
admitted to
this
the class is
Answers
Given : 36 students average height 3 ft 4 inches , 34 students with an average height of 3 feet 3.5 inches left the class
6 new students with average height 4 feet joined
To Find : New average Height
Solution:
1ft = 12 inches
3 ft 4 inches = 3 * 12 + 4 = 40 inches
36 students
Total Height = 36 * 40 = 1440 inches
Left 34 students
3 feet 3.5 inches = 39.5 inches
39.5 * 34 = 1343 inches
Joined 6
4 feet = 48 inches
48 * 6 = 288 inches
Total students = 36 - 34 + 6 = 8
Total Height = 1440 - 1343 + 288 = 385 inches
Average height = 385/8
= 48.125 inches
= 4 1/18 feet
= 4 feet 0.125 inch
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