The number of students playing at least one game is Total students - Students playing neither = $80 - 8 = 72$. This represents $|C \cup H|$. Using the principle of inclusion-exclusion, $|C \cup H| = |C| + |H| - |C \cap H|$. Substituting the values: $72 = 48 + 36 - |C \cap H|$. $72 = 84 - |C \cap H|$, so $|C \cap H| = 84 - 72 = 12$. These 12 students play both carrom and chess.
In a class of 80 students, 60% students play carrom, 45% play chess and 10% students neither play carrom nor chess. The number of students who play only chess is
Asked in BPSC Prelims Exam 65th · Topic: Tertiary Sector (Key Sub-sectors within Services: Overview and Interlinkages)
More Economic Development questions
- By selling 45 lemons for ₹40, a man loses 20%. How many should he sell for ₹24 to gain 20% in the trans- action?
- A mobile company charges a fixed rental of Rs.350 per month. It allows 200 calls free per the number of calls exceeds 200 per month and ceeds 400 per month. A customer made 150 calls in February and 250 calls in March. By how much percent each call is cheaper in March than each call in February for that customer?
- What is the percentage increase in the amount of money spent in Auto category from 2004 to 2005 ?
- Which of the following Airline Companies joint ventures are incorrectly matched ?
- Rs. 7300 is divided among 4 doctors, 3 teachers and 5 lawyers in such a way that 3 lawyers get as much amount as 2 teachers and 3 doctors get as much amount as 2 lawyers. How much amount would each teacher get?
- Two workers M and N are engaged to do a work. M working alone takes 8 hours more to complete the work than if both worked together. If N worked alone, he would need 4.5 hours more to complete the task than they both work together. What time will they take to complete the work together?
- P and Q are two alloys of copper and nickel prepared by mixing metals in the ratio of 2:7 and 7:11 respectively. If equal quantities of these two alloys are melted to form a third alloy Z, then what would be the ratio of nickel and copper in Z ?
- P, Q and R invested Rs. 40000, Rs. 50000 and Rs. 60000 respectively in a business. P gets 25% of profit earned for managing the business. The rest of the profit is divided among P, Q and R in proportion to their investments. If in a particular year, P gets Rs. 2000 lesser than the amount received by Q and R together, then what is the total profit for that year?