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পিতা ও পুত্রের বয়সের অনুপাত ১১ঃ ৪ । পুত্রের বয়স ১৬ বছর হলে পিতার বয়স কত?
Two hundred multiples of seven are chosen at random. and 300 multiples of eight are chosen at random. Approximately what percentage of the 500 selected numbers are odd?
Three maths classes: X, Y, and Z take an algebra test. The average score of class X is 83. The average score of class Y is 76. The average score of class Z is 85. The average score of class X and Y is 79 and the average score of class Y and Z is 81. What is the average score of the combined classes X, Y, and Z?
Three math classes , X, Y , and Z, take an algebra test. The average score in class X is 83. The average score in class Y is 76. The average score in class Z is 85. The average score of all students in classes X and Y together is 79. The average score of all student classes Y and Z together is 81. What is the average for all the three classes?
Average of first five multiples of 3 is :
The average of first five multiples of 3 is
What is the average of first 7 multiples of 7?
What is the average of first 30 multiples of 9?
What is the average (arithmetic mean) of all multiples of 10 from 10 to 400 inclusive ?
What is the average of all the multiples of ten from 10 to 190 inclusive ?