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381.In a class of 120 students , 45 students received a grade of B.What percent of the
382.In a rhombus whose area is 144 sq.cm on of its diagonals is twice as long as the other. The lengths of its diagonals are:____?
383.In a river, a man takes 3 hours in rowing 3 km upstream or 15 km downstream. What is the speed of the current?
384.In an exam, Amir scored 64 percent, Masood scored 36 percent and asif 44 percent. The maximum score awarded in the exam is 800. Find the average mark scored by all the three boys?
385.In digging a pond 20 m * 10 m * 5 m the volumes of the soil extracted will be____?
386.In how many different ways can the letters of the word ‘MATHEMATICS’ be
387.In how many different ways can the letters of the word ‘OPTICAL’ be arranged so that the vowels always come together?
388.In measuring the sides of a rectangle errors of 5 % and 3 % in excess are made. The error percent in the calculates area is____?
389.In order to obtain an income of Rs. 650 from 10% stock at Rs. ,96, one must make an investment of____?
390.In order to obtain an income of Rs. 650 from 10% stock at Rs. 96, one must make