Question

the mean of two number is 10 and their difference is zero.find the number

Answer 1

let the two numbers be x and y
their mean is 10 implies (x+y)/2=10
ie; x+y=20----------------------------(1)
given that;
x-y=0-------------------------------(2)
adding (1)&(2) ;
2x=20
x=10
put the value of x in any of the equation
x+y=20
10+y=20
y=20-10 =10

Answer 2

let the two numbers be x and x

(ATQ)

x+x/2 = 10

2x /2 = 10

2x = 10 × 2

2x = 20

x= 20/2

x= 10

so,two numbers are 10 and 10

Value of x = 10

x = 10

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