Related Questions

The average mark obtained by 15 students was 10 and the average mark obtained by 10 students was 15. What was the average mark obtained by all students?
A 10
B 8
C 12
D 15
The average mark obtained by 10 students was 6 and the average mark obtained by 6 other students was 10. What was the average mark obtained by all 16 students?
A 10
B 8
C 7.5
D 8.5
The average mark obtained by 10 students was 6 and the average mark obtained by 6 students was 10. What is the average mark obtained by all 16 students ?
A 10
B 8
C 7.5
D 8.5
The total number obtained by a student in Physics, Chemistry and Mathematics together is 120 more than the marks obtained by him in Chemistry. What is the average mark obtained by him in Physics and Mathematics together?
A 40
B 60
C 120
D Cannot be determined
To check acidity, one had better ------litmus paper.
A using
B useful
C usable
D use
To check acidity, one had better_____a litmus paper.
A suing
B use
C to use
D useful
To check acidity, one had better ——litmus paper.
A using
B useful
C usable
D use
Oxide of which of the following will turn red litmus blue?
A Magnesium
B Phosphorus
C Sulphur
D Carbon
The litmus paper utilized in the chemical laboratories is made of :
A Fern
B Algae
C Lichen
D Fungi
The average marks obtained by a group of 16 students was 20. One student left the group as a result of which the average of the remaining students rose to 21. But another student joined, as a result of which the average marks of the group dropped a bit and became 20.5. What was the average marks obtained by the student who left and the one who joined?
A 10
B 11
C 8
D 9

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