Q. Average weight of 20 girls in a class is 25 kg, when the age of a teacher is included the average weight increased by 2 then find out the weight of the teacher.
Answer 67
EXPLANATION
It is given that average weight of 20 girls is 25 kg,
let the teacher’s weight is X kg
25 = sum of the weights of 20 girls / 20
sum of the weights of 20 girls = 500
25 + 2 = (500 + X) /21
X = 67 kg
Q. If Aman borrowed same amount from Babu as Babu...
Showing posts with label average. Show all posts
Showing posts with label average. Show all posts
Thursday, 14 May 2020
Wednesday, 13 May 2020
SBI questions with answer set 2
Posted by eeducation on May 13, 2020 with No comments
Q. The ages of Sunil and Anil are in the ratio 8:7, after 6 years, the ratio of their ages will be 19 : 17. What is the difference in their present ages?
Answer 4 yr
EXPLANATION
Suppose the ages of Sunil and Anil are 8x yr and 7x yr, respectively. After 6 yr,
(8x+6)/(7x+6) =19/17
136x + 102 = 133x + 114
136x – 133x = 114 – 102
3x = 12 X = 12/3 = 4
Age of Sunil = 8x = 8 × 4 = 32 yr
Present age Anil = 7x = 7 × 4 = 28...
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