Q-1,2|| exercise 9.3||Std 8 maths ch 9|| standard 8 maths ch 9 in gujarati|| Child Guruji

The standard deviation of data 6,5,9,13,12,8 and 10 is

In a monthly test,the teacher decides that there will be three questions,one from each of Exercises 7,8 and 9 of the text book.If there are 12 questions in Exercise 7,18 in Exercise 8 and 9 in Exercise 9, in how many ways can three questions be selected?

Suppose a child’s status in Math is equivalent to 9 years, in Science 10 years, in English 11 years and Hindi 12 years then his educational age is

CBSE Class 9 Ultimate Strategy to Score 100 in Maths

If p:q=3:4 and q:r=8:9 then p:r is

The number of sigma and pi-bonds present in 1, 3-butadiene are respectively (a) 9 and 2 (b) 8 and 2 (c) 9 and 3 (d) 9 and 1 (e) 8 and 1

In the following number series how many 9's are there which are immediately preceded by a pair of numbers whose product is more than the product of the pair of numbers immediately following 9 ? 8 7 9 9 6 8 4 5 9 3 8 4 9 2 5 1 9 2 2 6 9 4 3 9 2 5 8 1) 4 2) 3 3) 6 4) 5 5) None of these

Find the mean, variance and the standard deviation for the following data : 5,9,8,12,6,10,6,8

A number when divided by three consecutive numbers 9, 11, 13 leaves the remainders 8, 9 and 8 respectively. If the order of divisors is reversed, the remainders will be 10, 8, 9 (b) 10, 1, 6 (c) 8, 9, 8 (d) 9, 8, 8

Study the following arrangement carefully and answer the questions given below: 6 7 8 9 9 8 7 9 7 7 8 9 7 8 7 6 9 6 8 9 7 7 9 8 9 7 6 8 8 7 How many such seven are there in the given series each of which is immediately preceded by 9 and also immediately followed by 8? 1) None 2 ) One 3)Two 4)Three 5)More than three