Question

marks = a 1 2 3 4
No of students = 0 4 3 2 1 .
If mean mark is 1 . find the value of a​

Answer 1

Answer:

0

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Answer 2

Answer:

a= -5

Step-by-step explanation:

mean= no.of observation ÷ total no. of observation

given:

mean=1 ;

no. of observation = a,1,2,3,4

so, by using mean formula

mean= no. of observation ÷ total no.of observation

1 = (a+1+2+3+4) ÷ 5

1= (a+10) ÷ 5

5 = a + 10

a = -10 + 5

a = -5

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