Selina Concise Class 7 Math Chapter 22 Probability Exercise 22B Solutions EXERCISE 22B (1) Given p(S) = 0.03 (i) The event will not snow tomorrow. (ii) P(S) = 1 – P(S) ⇒ P(S) = 1 – 0.03 ⇒ P(S) = 0.97 (2) Given Probabilities of five students A, B, C, D and E such as […]
Selina Concise Class 7 Math Chapter 22 Probability Exercise 22A Solutions EXERCISE 22A (1) (i) Total number of possible outcomes = 2 And, the number of favourable out comes = 1 ∴ Probability of getting a head = ½ (ii) Total number of possible outcomes = 2 And, the number of favorable out comes = […]
Selina Concise Class 7 Math Chapter 21 Data Handling Exercise 21B Solutions EXERCISE 21B (1) Sum of all observation = 53 + 61 + 60 + 67 + 64 = 305 Number of observation = 5 ∴ Required mean = 305/5 = 61 (2) First 6 natural number = 1, 2, 3, 4, 5, 6 […]
Selina Concise Class 7 Math Chapter 21 Data Handling Exercise 21A Solutions EXERCISE 21A (1) Consider the following numbers: (i) 52, 63, 63, 68, 70, 71, 73, 75, 75, 76, 77, 82, 83, 90, 92, 93, 99, 103, 105, 115 (ii) Range of given numbers = Largest number – smallest number ⇒ Range of given […]
Selina Concise Class 7 Math Chapter 19 Congruency: Congruent Triangles Exercise 19 Solutions EXERCISE 19 (1) (i) In these triangles, corresponding sides are not equal. Hence, these are not congruent triangles. (ii) In the first triangle, Third angle = 180° – (40° + 30) = 180° – 70° = 110° Since, two sides of one […]
Selina Concise Class 7 Math Chapter 18 Recognition of Solids Exercise 18 Solution EXERCISE 18 (1) (i), (ii) and (v) (4) Faces a 5 20 6 Vertices 6 b 12 d Edges 12 9 c 12 (i) a + 6 – 12 = 2 ⇒ a – 6 = 2 ⇒ a = 2 + […]
Selina Concise Class 7 Math Chapter 17 Symmetry Exercise 17C Solution EXERCISE 17C (1) It has two lines of symmetry does a rhombus have. (2) The order of rational symmetry can be defined as the number of times that a shape appears exactly the same during a 360o rotation. Order of rotational symmetry of a […]
Selina Concise Class 7 Math Chapter 17 Symmetry Exercise 17A Solution ICSE Class 7 Selina solution: Symmetry Chapter 17. Here you get easy solutions of ICSE class 7 Math Book Chapter 17. Here we give Chapter 17 all solution of class 7. Its help you to complete your homework. If you follow this site you […]
Selina Concise Class 7 Math Chapter 16 Pythagoras Theorem Exercise 16 Solution EXERCISE 16 (1) Applying Pythagoras theorem, BC2 = AB2 + AC2 ⇒ BC2 = (24)2 + (18)2 ⇒ BC2 = 576 + 324 = 900 ⇒ BC = √900 = 30 cm (2) Applying Pythagoras theorem, XY2 = XZ2 + ZY2 ⇒ XZ2 […]
Selina Concise Class 7 Math Chapter 15 Triangles Exercise 15B Solution EXERCISE 15B (1) Find the unknown angles in the given figures: (i) x = y (opposite to equal sides) Then, x + x + 80° = 180° ⇒ 2x = 180° – 80° = 100° ⇒ x = 100°/2 ⇒ x = 50° So, […]
