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A person ordered 5 pairs of black socks and some pairs of brown socks. The price of a black pair was thrice that of a brown pair. While preparing the bill, the bill clerk interchanged the number of black and brown pairs by mistake which increased the bill by 100%. What was the number of pairs of brown socks in the original order?
A man ordered 4 pairs of black socks and some pairs of brown socks. The price of a pair of black socks is double that of a brown pair. While preparing the bill the clerk interchanged the number of black and brown pairs by mistake which increased the bill by 50% . The ratio of the number of black and brown pairs of socks in the original order was = ?
Melinda's lights went out. She has 3 pairs of red socks in her drawer, 2 pairs of black socks, and 5 pairs of white socks. What is the minimum number of pairs she must remove from the drawer to ensure that she has a pair of each color
In a certain sock drawer, there are 4 pairs black socks, 3 pairs of back socks, 3 pairs of gray of gray socks and 2 pairs of corage socks. It socks removed at random without replaced, what is the minimum number of socks that must removes in order to ensure that two socks of the the same color have been removed?
5 pairs of footwears are to selected out of 4 pairs of shoes and 6 pairs of sandals. In how many ways this can be done if there should be at least 3 pairs of shoes?
The sliding pairs, turning pairs and screw pairs form lower pairs.
Cost of 3 cricket balls = cost of 2 pairs of leg pads. Cost of 3 pairs of leg pads = cost of 2 pairs of gloves. Cost of 3 pairs of gloves = cost of 2 cricket bats. If a cricket bat costs Rs 54, what is the cost of a cricket ball.
Consider the following statements: I. The degree of freedom for lower kinematic pairs is always equal to one. II. A ball and socket joint has three degrees of freedom and is a higher kinematic pair. III. Oldham’s coupling mechanism has two prismatic pairs and two revolute pairs. Which of the statements given above is/are correct?
Which among the following is NOT correct regarding the number of chromosomes in the corresponding organisms? I. Frog: 14 pairs  II. Cat: 26 pairs  III. Dog: 26 pairs 
Which of the following pairs can be considered as the higher pairs A. Pairs of gear in mesh B. Belt and Pulley C. Cam and follower