The mean of the 8 smallest numbers from a group is 17, while the mean of all the numbers of the group taken together is 20. If the mean of the numbers leaving the smallest eight out is 22, how many numbers were present in the group in all?
A jeweller made a piece of uniquely designed diamond necklace and the selling price was fixed at Rs 10,00,000. In making this piece, on the raw material, the jeweller had invested Rs 3,00,000 and had paid a labour charge of Rs 2,00,000. If 20% of the raw material cost was of gold, what is the actual amount the jeweller had spent in procuring the gold?
A and B together can complete a task in 1.2 days. However, if A works alone, completes half the job and leaves and then B works alone and completes the rest of the work, it takes 2.5 days in all to complete the work. If B is more efficient than A, how many days would it have taken B to do the work by herself?
In a shopping mall, a handbag was sold for Rs 2,990 after giving a discount of P%. If the marked price of the handbag was Rs 4,600, find the value of P?
