Question

The class size and class mark respectively of the class 15 - 20 is

a) 17.5, 15 b) 5, 15 c) 5, 17.5 d) 5, 20​

Answer 1

Answer:

class size = size of the class so 20 - 15 = 5 .

class mark = upper limit + lower limit ÷2

$so(15 + 20) \div 2 = 17.5$

so answer c) 5, 17.5 is correct.

Answer 2

Answer:

given class interval is , 15 - 20

• so, class size = 20 - 15 = 5
• and class mark = (1 5+ 20)/2 = 35/2 = 17.5

so, the correct answer is option c