Measures of Cen...

The mean of the following distribution is

The numbers $$ 4, 6\  and\  8$$  are the frequencies of $$(x +  2), x \ and\  (x - 1) $$ respectively . If their arithmetic mean is $$8,$$  the value of  $$x$$  is

The examination marks of $$250$$ pupils are recorded below. Find the mean.

A contractor employed $$18$$  labourers at Rs. $$12$$ per day, $$ 10$$ labourers at Rs.$$ 13.50 $$ per  day,$$ 5$$ labourers at Rs.$$ 25 $$ per  day and $$2$$ labourers at Rs.$$ 42$$ per day. The average  wage of a labourer per day is 

In a class test in English $$10$$ students scored $$75$$ marks, $$12$$ students scored $$60$$ marks, $$8$$ scored $$40$$ marks and $$3$$ scored $$30$$ marks, the mode  for their score is

The median of variables 5, 8, 10, 13, 17, 21, 27, 30, 33, 42 is

Arithmetic mean for the given data is

The average weight of $$10$$ men is decreased by $$ 3 \space kg$$  when one of them whose weight is $$80 kg $$  is replaced by a new person. The weight of the new person is

In a family, there are $$8$$ men, $$7$$ women and $$5$$ children whose mean ages separately are respectively $$24,20$$ and $$6$$ years. The mean age of the family is