Question
A student multiplied a number by 3/5 instead of
5/3, What is the percentage error in the calculation ?Solution
Let the number be x. Then, ideally he should have multiplied by x by 5/3. Hence Correct result was `x xx5/3=(5x)/3` By mistake he multiplied x by 3/5 . Hence the result with error = `(3x)/5` Then, error = `(5x)/3-(3x)/5=(16x)/15` Error % = `(Error)/(True Value)xx100=(16/15x)/(5/3x)xx100=64%`
R and S invested Rs. 18,000 and Rs. 12,000 respectively in a venture. After 5 months, R withdrew Rs. 3,000 and T joined the partnership with Rs. 9,000. ...
The savings of G and H are equal. The difference between H's expenditure and the total savings of G and H is nil. H's income amounts to Rs. 45,000, and ...
‘D’ started a business with a capital of Rs. 15000. After 4 months, ‘E’ joined the business with a capital of Rs. 10000. 6 months after ‘E’,...
Rohit and Dev invested ₹32,000 and ₹18,000 respectively. For the next four months after the first month both kept on adding ₹2000 every month. In ...
'A' initially invested 75% of the total capital in a business. After 4 months, 'C' joined, and at that point, 'A's investment became 50% of the total ca...
P, Q and R enter into a partnership by investing Rs.5000, Rs.8000 and Rs.5600 respectively. After 4 months, P invested Rs.1400 more and Q withdraw the ...
Sonia and Isha started a business with investments of Rs. 3100 and Rs. 2300, respectively. Four months into the business, Jai joined them with an invest...
If the ratio of time periods of investment of A and B is 3:5, profit at the end of the year is Rs.120000 and A’s share in it is Rs.20000, then what is...
K starts a business by investing ₹75,000. Four months later, L joins the business, contributing an amount that is 20% more than K's investment. At the...
- ‘P’ and ‘Q’ invested Rs. 7200 and Rs. 4800 respectively for 9 months and 15 months. P kept 35% of his profit and donated the rest. His remaining pr...
Relevant for Exams:
