Question
How many two-digit even numbers can be formed using the
digits 3, 4, 5, 7, and 8, ensuring that no digit is repeated?Solution
Solution There will be two cases in which unit digit ends with an even number. In both cases, the number needs to end at either 4 or 8. In both cases, total count of remaining digits = 4 Therefore, total 2-digit number formed =Â 4C1Â XÂ 2CÂ1Â = 4 X 2 = 8
The sum of three numbers is 226. If the ratio of the first to the second is 4:5 and that of second to the third is 7: 10 then the second number is?
A shopkeeper sells a product for ₹720 at a profit of 20%. What was the cost price of the product?
The number 8192 is which term in the following geometric sequence 2, 8, 32, 128, . . . . . . .
Mean of a grouped data calculated using direct method, assumed mean method or step deviation method:
In an AP, S₅ = 75 and S₇ = 119, where S_n is sum of first n terms. Find the 10th term.
what is the mean of given numbers 25, 15, 12, 23, 15,
The arithmetic mean and geometric mean of two numbers are 7 and 2√10 respectively, then find the numbers.
What will be the 11th term of the arithmetic progression 3, 8, 13, _____?
Find the mode of the following data:
6,15,18,6,18,11,23,22,6,18,15,22,12
If p:q = 5:7 and p + q = 408, then find the value of (q - p).
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