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Three Science classes A, B and C take a ...

Three Science classes A, B and C take a Life Science test. The average score of class A is 83. The average score of class B is 76. The average score of class C is 85. The average score of class A and B is 79 and average score of class B and C is 81. then the average score of classes A, B and C is-
तीन विज्ञान की कक्षाएं A, B और C जीवन-विज्ञान को परीक्षा देती हैं। कक्षा A के औसत अंक 83 है। कक्षा B के औसत अंक 76 हैं। कक्षा C के औसत अंक 55 हैं। कक्षा A और B के औसत अंक 79 और कक्षा B और C के औसत अंक 81 है। कक्षा A,B और C के औसत अंक कितने है?

A

80

B

80.5

C

81

D

81.5

Text Solution

Verified by Experts

The correct Answer is:
D
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