Question

The average weight of 5 quantities is 10 kg and the average weight of 3 of them is 9 kg, what is the average weight of remaining 2? (A) 6 kg
(B) 6.5 kg
(C) 7 kg
(D) 6.25 kg​

Answer 1

Answer:

Correct option is

D

89.85kg

Difference in weight =87−78=9kg

∴ Correct average weight =89.4+  

20

9

​

 

=89.4+0.45=89.85kg

Step-by-step explanation: and

its 6.25kg

Answer 2

The average weight of remaining two quantities = 11.5 kg

Correct question : The average weight of 5 quantities is 10 kg and the average weight of 3 of them is 9 kg, what is the average weight of remaining 2? (A) 6 kg

(B) 11.5 kg (C) 7 kg (D) 6.25 kg

Given :

The average weight of 5 quantities is 10 kg and the average weight of 3 of them is 9 kg

To find :

The average weight of remaining two quantities

(A) 6 kg

(B) 11.5 kg

(C) 7 kg

(D) 6.25 kg

Solution :

Step 1 of 3 :

Calculate total weight of 5 quantities

Here it is given that the average weight of 5 quantities is 10 kg

∴ Total weight of 5 quantities

= 5 × 10 kg

= 50 kg

Step 2 of 3 :

Calculate total weight of remaining two quantities

The average weight of 3 of them is 9 kg

∴ Total weight of 3 of them

= 3 × 9 kg

= 27 kg

∴ Total weight of remaining two quantities

= 50 kg - 27 kg

= 23 kg

Step 3 of 3 :

Calculate average weight of remaining two quantities

∴ Average weight of remaining two quantities

= 23/2 kg

= 11.5 kg

Hence the correct option is (B) 11.5 kg

━━━━━━━━━━━━━━━━

Learn more from Brainly :-

$1.$ If the sum of twelve marks is 510, what is their average?

https://brainly.in/question/38904597

2. The mean of 5 numbers is 39. If one number is excluded, their mean is 35, find the excluded number

https://brainly.in/question/33419522

#SPJ2