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The average marks of a group of 15 stude...

The average marks of a group of 15 students in maths is 87. Then, 25 other students join and the total average marks becomes 79.5. The average of 24 students of the other group is 74. The marks obtained by the 25th student of the other group is :
15 छात्रों के एक समूह का गणित में औसत अंक 87 है | फिर अन्य 25 छात्र शामिल होते हैं और कुल औसत अंक 79.5 हो जाता है| दूसरे समूह के 24 छात्रों का औसत 74 है | दूसरे समूह के 25 वें छात्र द्वारा प्राप्त अंक हैं:

A

82

B

99

C

76

D

89

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