Question Progress 1/6
Exam Paper Progress
19/80
Grade For This Paper
U 3 5 6 7 8
36%
a) 2
b)
44
c)
d)
The cumulative frequency graph shows information about the times, in minutes,
taken by 40 men to complete a fitness exercise.
Cumulative
a) How many men took more than frequency
80 mins to complete the exercise?
(1)
40
b) Use the graph to find an estimate
for the median time taken.
(1) 30
c) Use the graph to find an estimate
for the interquartile range.
(2)
One of the 40 men is chosen at random.
d) Use the graph to find an estimate 10
for the probability that this person
took between 60 mins and 80 mins
to complete the exercise.
80 100
(2)
Time (mins) Total marks: 6
/
20
0
20
40
60

for the first question it would be the second answer for the second question it would be the third answer and for the third question it would be the first answer

step-by-step explanation:

step-by-step explanation:

we are given a graph for system of inequalities.

in order to write the system of inequalities for the given graph, we need to find the inequality for each of the line separately.

let us find the slope of dotted line first.

taking two coordinates on the graph.

let us say (0,0) and (3,1).

let us find the slope of the line now.

slope of the dotted line would be =.

y-intercept of dotted line is y=0 only.

plugging slope m= and b=0 in slope-intercept form y=mx+b, we get

.

the line is shaded up of that dotted line.

therefore, for shading up we would take greater than inequality symbol > .

and because it's a dotted line we would take only > symbol in place of = sign in above equation of line.

therefore, inequality for dotted line would be

let us take two points (3,1) and (0,4) on the solid line.

slope of the solid line would be =.

for the solid line we have y-intercept b= 4.

plugging slope m= -1 and b=4 in slope-intercept form y=mx+b, we get

y = -1x + 4.

the line is shaded down of that solid line.

therefore, for shading down we would take less than inequality symbol < .

and because it's a solid line we would take ≤ symbol in place of = sign in above equation of line.

therefore, inequality for solid line would be

c

step-by-step explanation:

answer is because 4×10=40

and 98×4= is 392

40,392