20% of dolls produced in a factory were defective,25% of the remaining were damaged.If 4800 dolls were left over,what was the original number of dolls?

20% of the bolts produced in a factory are found to be defective. Find the probability that in a sample of 10 bolts chosen at random, exactly 2 will be defective using binomial distribution.

A factory has two machines A and B. Past records show that the machine A produced 60% of the items of output and machine B produced 40% of the items further 2% of the items produced by machine A were defective and 1% produced by machine B were defective. If an item is drawn at random, what is the probability that it is defective?

A factory has two machines A and B. Past records show that the machine A produced 60% of the items of output and machine B produced 40% of the items further 2% of the items produced by machine A were defective and 1% produced by machine B were defective. If an item is drawn at random, what is the probability that it is defective?

In a college, 40% of the students were allotted group A, 75% of the remaining were given group B and the remaining 12 students were given group C. Then the number of students who applied for the groups is

Medha deposited 20% of her money in a bank. After spending 20% of the remainder, she has Rs. 4800 left with her. How much did she originally have?

A man loses 20% of his money. After spending 25% of the remainder, he has Rs 480.00 left. How much money did he originally have ?

A man loses 20% of his money.After spending 25% of the remainder,he has Rs 480.00 left. How much money did he originally have?