Question

Q.The Mean of 2,7,6,x is 5 and Mean of 18,6,x,y is 10. What is the value of y ?​

Answer 1

Answer:

Answer

Correct option is

B

20

Given that average of 2,7,6,x is 5

Therefore, 5=

4

2+7+6+x

⟹20=15+x

⟹x=20−15=5

Given that average of 18,1,6,x,y is 10

Therefore, 10=

5

18+1+6+5+y

(since, x=5)

50=30+y

⟹y=50−30=20

Step-by-step explanation:

Answer

Correct option is

B

20

Given that average of 2,7,6,x is 5

Therefore, 5=

4

2+7+6+x

⟹20=15+x

⟹x=20−15=5

Given that average of 18,1,6,x,y is 10

Therefore, 10=

5

18+1+6+5+y

(since, x=5)

50=30+y

⟹y=50−30=20

Answer 2

Answer:

Step-by-step explanation:

Given that average of 2,7,6,x is 5

Therefore, 5= $\frac{2+7+6+x}{4}$

⟹ 20 = 15 + x

Given that average of 18 ,1, 6 ,x ,y is 10

Therefore, 10 = $\frac{18+1+6+5+y}{5}$ (since x = 5)

50 = 30 + y

⟹ y = 50 − 30 = 20