New Learning Composite Mathematics Class 7 SK Gupta Anubhuti Gangal Data Handling Chapter 15C Solution

New Learning Composite Mathematics SK Gupta Anubhuti Gangal Class 7 Data Handling Self Practice 15C Solution

(1)

(a) 5, 3, 5, 2, 3, 5, 17

Mode – 5

(b) 1, 7, 13, 19, 25

= No Mode

(c) 4, 6, 8, 4, 10, 4, 6, 12, 6, 10

= Modes – 4, 6

(d) 51, 68, 70, 76, 55, 70, 73, 68, 70, 81

= Mode – 70

(e) 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4

= Modes – 8, 4

(f) 29, 29, 10, 10, 3, 3, 14, 10, 2, 2

= Mode – 10

(g) 26, 32, 26, 21, 83, 26, 83, 67, 53, 83, 85

= Modes – 26, 83

(2)

(a)

Size 2 3 4 5 6 7
Frequency 4 6 2 5 3 1

Mode – 3

(b)

Size of shoes 6 7 8 9 10
No. of persons 12 20 40 15 7

Mode – 8

(3)

(a) 1, 6, 8, 11, 11, 11, 14, 16, 21

(i) The mode = 11

(ii) The median = 11

(iii) The mean = (1+6+8+11+11+11+14+16+21)/9

= 99/9

= 11

(4) Number of fiction books read by 28 grade VII pupils:

4,6,1,7,3,9,5,7,8,5,4,6,10,6,9,5,6,6,8,6,8,5,10,7,2,5,3,7

Mode = 6

Mean = (4+6+1+7+3+9+5+7+8+5+4+6+10+6+9+5+6+6+8+6+8+5+10+7+2+5+3+7)/28

= 168/28

= 6

(5) 20,21,19,22,18,23,25,22,23,20,23,20,22,21,24,21,22,23,19,21,22,22,24,26,22

Mode = 22

Mean = (20+21+19+22+18+23+25+22+23+20+23+20+22+21+24+21+22+23+19+21+22+22+24,26+22)/25

= 550/25

= 22

(6)

(a) T

(b) F

(c) T


Updated: August 29, 2020 — 5:05 pm

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