## Selina Concise Class 10 Math Chapter 25 Exercise 25B Probability Solutions

Selina Concise Class 10 Math Chapter 25 Exercise 25B Probability Solutions   Probability Exercise: 25B (Q1) Nine cards (identical in all respects) are numbered 2 to 10. A card is selected from them at random find the probability that the card selected will be: (i) An even number (ii) A multiple of 3 (iii) An […]

## Selina Concise Class 10 Math Chapter 25 Exercise 25A Probability Solutions

Selina Concise Class 10 Math Chapter 25 Exercise 25A Probability Solutions   Probability Exercise: 25A (Q1) A coin is tossed once find the probability of: (i) Getting a tail (ii) Not getting a tail Solution: If a coin is tossed once then the simple space is = {H, T} [H = Head and T – […]

## Selina Concise Class 10 Math Chapter 23 Graphical Representation (Histograms and ogives) Solutions

Selina Concise Class 10 Math Chapter 23 Graphical Representation (Histograms and ogives) Solutions   Graphical Representation (Histograms and ogives)   (Q1) Draw histograms for the following frequency distributions (i) Class interval 0 – 10 10 – 20 20 – 30 30 – 40 40 – 50 50 – 60 Frequency 12 20 26 18 10 […]

## Selina Concise Class 10 Math Chapter 24 Exercise 24D Measures of Central Tendency Solutions

Selina Concise Class 10 Math Chapter 24 Exercise 24D Measures of Central Tendency Solutions   Exercise – 24D   (Q1) (i) Find the mode of the following data: (i) 7, 9, 8, 7, 7, 6, 8, 10, 7 and 6 (ii) 9, 11, 8, 11, 16, 9, 11, 5, 3, 11, 17 and 8 Solution: […]

## Selina Concise Class 10 Math Chapter 24 Exercise 24C Measures of Central Tendency Solutions

Selina Concise Class 10 Math Chapter 24 Exercise 24C Measures of Central Tendency Solutions   Exercise – 24C (Q1) A student got the following marks in 9 questions of question paper. 3, 5, 7, 8, 0, 1, 4 and 6 Find the median of these marks Solution: Given number of marks 3, 5, 7, 3, […]

## Selina Concise Class 10 Math Chapter 24 Exercise 24B Measures of Central Tendency Solutions

Selina Concise Class 10 Math Chapter 24 Exercise 24B Measures of Central Tendency Solutions   Exercise – 24B   (Q1) The following table gives the ages of 50 students of a class. Find the arithmetic mean of their ages Age – years 16 – 18 18 – 20 20 – 22 22 – 24 24 […]

## Selina Concise Class 10 Math Chapter 24 Exercise 24A Measures of Central Tendency Solutions

Selina Concise Class 10 Math Chapter 24 Exercise 24A Measures of Central Tendency Solutions   Measures of Central Tendency Exercise – 24A   (Q1) Find the mean of the following set of numbers: (i) 6, 9, 11, 12 and 7 Solution: Total set of numbers are 5. ∴ n = 5 We know that, the […]

## Selina Concise Class 10 Math Chapter 11 Exercise 11C Geometric Progression Solutions

Selina Concise Class 10 Math Chapter 11 Exercise 11C Geometric Progression Solutions   Geometric Progression Exercise: 11C Question: 1 Find the seventh term from the end of the series: √2, 2, 2, √2, —– 32 = Solution: √2 , 2, 2√2, ——–, 32 Here, a = √2 Common ratio (r) = r2/r1 = 2/√2 = […]

## Selina Concise Class 10 Math Chapter 11 Exercise 11B Geometric Progression Solutions

Selina Concise Class 10 Math Chapter 11 Exercise 11B Geometric Progression Solutions   Geometric Progression Exercise: 11B   Question: 1 Which term of the geometric Progression: -10, 5/√3, -5/6, ——, is -5/72  ? = Solution:- Given geometric progression is -10, 5/√3, -5/6, —— Here, a1 = -10, a2 = 5/√3, a3 = -5/6, ——- Now, […]

## Selina Concise Class 10 Math Chapter 11 Exercise 11A Geometric Progression Solutions

Selina Concise Class 10 Math Chapter 11 Exercise 11A Geometric Progression Solutions   Geometric Progression Exercise: 11A Question: 1 Find which of the following sequence form a Geometric progression (1) 8, 24, 72, 216, ——– = Solution:  Given sequence id 8, 24, 72, 216 ——– Here, a1 = 8, a2 = 24, a2 = 72 […]