In class height of 20 student is 120cm and height of 10 student is 100 cm what is average height of class
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Answer:
113.33 cm
Step-by-step explanation:
Sum of total heights
= (20 students × 120 cm/student) + (10 students × 100 cm/student)
= 2400 cm + 1000 cm
= 3400 cm
Total number of students = 20 + 10 = 30
Average height = Sum of all the heights / Total number of students
= (3400 cm) / (30 students)
= 113.33 cm/student
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