-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

Related MCQs

• -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
• -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
• -In a statistical investigation of 1000 families of a city, it was found that 60 families had neither a radio nor a TV. 790 families had a radio and 210 families had a TV. How many families in the sample have both?
• -The angle of elevation of the top of a tower is 30 degrees, on walking 100m meter, the elevation is found to be 60 degrees. Find the height of the tower.
• -If the fractions 5/6, 7/8, 6/7 and 8/9 are arranged in descending order then the correct sequence is:
• -If the sum and difference of two numbers are 20 and 4, then the product is
• -The product of two positive numbers is 120 and the sum of their square is 289. The difference between them is
• -Ram if five time as old as shyam. If their differences of age is 8 years then how old is Ram?
• A person climbs up a pole of 88 meters high. In every minute he climbs 12 meters but slips down 8 meters. How much time will he take to reach the top?
• -A father said to his son, “I was as old as you are at the present at the time of your birth”. If the father’s age is 48 years now, the son’s age 5 year back was