Q-3|| exercise 9.5 ||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?

Subtract as indicated: 8/3-5/9

In a school, students must take at least one of these subjects: Maths, Physics or Chemistry. In a group of 50 students, 7 take all three subjects. 9 take Physics and Chemistry only, 8 take Maths and Physics only and 5 take Maths and Chemistry only. Of these 50 students, x take Maths only, x take Physics only and x + 3 take Chemistry only. Draw Venn diagram, find x, and hence find the number taking Maths.

In the following number series how many such 8s are there which are immediately preceded by a pair or number whose product is more than the product of pair of of numbers immediately following 8 ? "5 3 8 2 4 5 8 3 1 9 7 4 9 6 8 5 7 8 6 5 8 4 7 5 2 8 8 3 3 5 4 2 8 6 5 3 7 8 5 9 8 7"

Find the variance and standard deviation of the scores 7 , 8 , 9 , 10 and 16.

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

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

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