-The mean of ten observations is 23. If two observations 4 and 7 are substituted by 3 and 8, then the new value of mean will be

Related MCQs

• -The mean of 10 observations is 21. If each observation is multiplied by 4 and 5 is subtracted from each of them, then the mean will be
• -The mean of 100 items was found to be 40. If at the time of calculation two items were wrongly taken as 36 and 32 instead of 54 and 34, the correct mean is
• -If √p+√q=16 and √p-√q=8, then the value of p/q is
• -If the sum and difference of two numbers are 20 and 4, then the product is
• -If a:b=2:5, then the value of (2a+3b):(7a+5b) is
• -The cost price of 20 articles is the same as the selling price of ‘x’ articles. If the profit is 25% then the value of ‘x’ is
• -If the fractions 5/6, 7/8, 6/7 and 8/9 are arranged in descending order then the correct sequence is:
• -If A:B=6:7 and B:C=8:9, the value of C:A is
• -Ram if five time as old as shyam. If their differences of age is 8 years then how old is Ram?
• -If 93n+2 = 275n+1, then ‘n’ is equal to