The table shows information about the number of points scored by 30 students in a quiz.
Number of points
0
Frequency
4
a) What is the modal number of points?
(1)
1
3
IN
5
7
b) Work out the total number
of points scored.
(2)
4
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5
-
5
Total marks: 3

answer: 60

step-by-step explanation:

1/2a + (2/3×30)   = 50

1/2a + 20 = 50

1/2a = 30

a = 60

option 1 is correct.

step-by-step explanation:

y varies inversely with x and constant of variation is 4

the equation will be:

y = k/x

where k =4 so,

y = 4/x

if we put values of x of option 1 in the above equation and find values of y

y = 4/-2 => y =-2

y = 4/-1 => y = -4

y = 4/1 => y = 4

y = 4/2 => y =2

so, all the values of x and y are correct.

if we put values of x given in other options and find value of y we cannot find whole table satisfying the equation.

hence option 1 is correct.

i think it is 70

step-by-step explanation: