CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

A class consists of 50 students out of which 30 are girls.The mean of marks scored by girls in a test is 71 (out of 100) and the mean score of the whole class is 71.8. Find the mean of marks scored by boys in the test.

A
73
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
76
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
74
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
72
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

The correct option is D 72

The mean of 30 girls =73

The total students=50

out of that 30 are girls.

Totalno of boys=5030=20

The score of girls =73×30=2190

The score of boys=71×20=1420

The meanscore of total class =2190+142050=3615=72.2



flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Central Tendency
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon