In Dhaka City 90% of the population own a car, 15% own a motorcycle, and everybody owns one or the other of both. What is the percentage of motorcycle owners who own cars?

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A school has 10 classes with the same number of students in each class. One day, the weather was bad and many students were absent. 3 classes were half full. 5 classes were 3/4 full and 2 classes were 1/6 empty. A total of 74 students were absent. What is the total number of students in this school?

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In a shop, the cost of 5 shirts, 5 pairs of trousers and 3 hats is Tk. 710. The cost of 11 shirts, 11 pairs of trousers and 8 hats is Tk. 1,590. What is the total cost of 1 shirt, 1 pair of trousers and 1 hat?

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If a person walks at 14 km/hr instead of 10 km/hr, he would have walked 20 km more. The actual distance traveled by him is-

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The total age of A, B and C is 90 years. Ten years ago the ratio of their ages was 1 : 2 : 3. What is the present age of B?

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