Question
A box contains 10 red balls, 12 green balls, and 8 blue
balls. Two balls are drawn at random. What is the probability that both balls drawn are either red or green?Solution
Total balls = 10 + 12 + 8 = 30. P(both red or green) = P(both red) + P(both green). P(both red) = (10/30) * (9/29) = 90/870. P(both green) = (12/30) * (11/29) = 132/870. P(both red or green) = 90/870 + 132/870 = 222/870 = 37/145. Correct Option: d
Two vehicles, ‘E’ and ‘F’, were sold for Rs. 5000 each. The profit gained on ‘E’ is equal to the loss incurred on ‘F’. If the cost price...
Kabir bought a TV for Rs. 2800 and spent some money on installation. He marked it up by 25%, gave a Rs. 320 discount, and earned a 15% profit. Find the ...
Seema sold a laptop at a profit of 15%. If she had bought it at 10% less and sold it for ₹ 2,100 less, she would have gained 20%. What was the cost p...
Mohan bought a new car from the showroom and after one year he sold it to Shyam at a profit of 20 percent. Shyam sold the same car to Sumit at the loss...
- An article is marked 60% above its cost price and sold after allowing a discount of 20%. If the selling price of the article is Rs. 3,840, then find the pr...
A shopkeeper marked an article Rs. 850 above its cost price and sold it after giving a discount of 30% and earned a profit of 20%. Find the cost price o...
- A woman bought a handbag at an 8% discount. If she had bought it at a 16% discount, she would have paid ₹1600 less. Find the market price of the handbag.
Rahul purchased a car for Rs 1,30,000 and spent Rs 6000 on transportation and 15% of its cost on repair. At what price should he sell it so as to earn a...
The sum of the cost prices of two articles is Rs. 3200. One article is sold at 25% profit and another at 30% loss. If the sum of their selling prices is...
A school bag is sold for Rs.540 after giving two successive discounts of 10% and 20%. If school bag is marked up by Rs.400 above its cost price, then fi...
Relevant for Exams:
