A is trying to break a bulb by throwing balls at it. If he hits the bulb 5 times in every 7 throws and bulb breaks 3 times out of 15 hits, then find the probability of A breaking the bulb.
Probability of A hitting the bulb = 5/7 Probability of the bulb being broke on getting hit = 3/15 = 1/5 Probability of A breaking the bulb = (5/7) × (1/5) = 1/7
In how many days 8 boys and 6 girls can complete the work working together?
Statement I: The ratio of efficiency of boy to girl is 3:1
What is the capacity of a cylindrical tank?
I. The radius of the base is half of its height, which is 14metres.
II. The area of the base i...
P, Q and R together can complete a work in 12 days. All of them worked together for 6 days and then P left. How much time will Q and R together will tak...
Find the rate percent?
I. The ratio of difference of C.I and S.I for 2 years and 3 years is 19:6.
II. The difference between C.I and S.I o...
What is the average speed of Boat?
I: Average speed of Bike is thrice that of average speed of Boat. Average speed of Van is 80 km/hr.
II...
How many students passed in first class?
I. 75% of the students who appeared in the examination have passed in first or second or third class.
The difference between the two digits of a two – digit number is 6. What is the number?
I. The digit at unit place is bigger than the ten&r...
A rice bag and a wheat bag are the two items. The total cost of the wheat bag and the rice bag is Rs. 4400. The profit margin on the rice bag sale is 20...
What is the area of a square?
I. The measure of diagonal of the square is given.
II. The measure of one side of the square is given.
<...What is marked price of the product?
Statement I – After giving the 10% discount on mark price the shopkeeper make a profit of Rs. 45 by sell...
