Question

Please tell the crt answer with explanation i will mark them brainlist ​

Answer 1

Step-by-step explanation:

Here , The average marks obtained by a student in 6 subjects = 88

Correct sum of marks obtained by the student = 88 × 6

– 86 + 68

Correct sum of marks obtained by the student = 528 – 86 + 68 = 510

∴ Correct average = 510 ÷ 6 = 85

Second method to solve this question with the help of given formula :

Here, n = 6, m = 88 a = 68, b = 86

Correct mean = m + (a - b)/n

Correct mean = 88 + (68 - 86)/6

Correct mean = 88 - 18/6

Correct mean = 85

Answer 2

Answer:

x=22

Step-by-step explanation:

marks in 5 subjects=86

let 6th subject marks =x

now,

average marks=18

total marks/total subjects=18

86+x/6=18

86+x=18*6

86+x=108

x=108-86

x=22

thank you

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