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Class 10R sat a test. The mean mark of the class was 70%. There are 30 students in class 10R, 20 of whom are boys. The mean mark for the boys in the test was 62%.Work out the mean mark for the girls.

Posted 6 months ago

Answers (2)

Hannah Lee 6 months ago

Answer: Mean mark for the girls is . Step-by-step explanation: Given information: Number of total students in the class= Number of boys in the class= Then, number of girls will be== The mean mark of the class= The mean mark for the boys is Then, mark for the boys The mark for the girls= Then mean mark of the girls will be   Hence, mean mark for the girls is . For more details please refer link : https://brainly.in/question/32760552?referrer=searchResults

Alice Johnson 6 months ago

86% 70X30=2100 20X62=1240 2100-1240 = 860 860/10=86

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