Question

the mean marks of three students is 60. one of student mark is 66. the other two students is same marks. find the other students marks​

Answer 1

Step-by-step explanation:

step 1 : let take x as the other number .

since it is given in the question that other two marks are same therefore we can say x+x =2x

step 2: now lets put it in a equation ;

             (66+2x)/3 = mean=60

            therefore , sending 3 on the other side we get ;

            66+2x=60*3

            66+2x=180

            2x=180-66

            2x=114

            x=57

as we know the other marks is x and putting the value of x we get 57.