Page 88 - Math SL HB Sem 3
P. 88
M 1 2/54{ATME/SP2,ENG/TZI DL
Do NOT write solutions on this page.
..4nswer all questiotts on the answer sheets provided- Please start each question on a new page.
(+'
[Muimum mark: 13J
The histogram below shows the time Z seconds taken by 93 children to solve apvzzls.
20 :t-:
-L_'
ti
l8
i:
l6 li ' ,-'
-t--:
t4 _!i
t2
I tl
q l--
l0 it
I
6
4
2
0 45 55 65 75 85 95 105 ll5 T
Time
The following is the frequency distribution for Z.
Time 45<T<55 55<r<65 65<T<75 75<r<85 85<7<95 95<r<t05 105<r<1 l5
Frequency 7 14 p 20 l8 q 6
(a) (i) Write down rhe value of p and of
4.
(ii) Write down the median class.
[3 marl<s]
(b) A child is selected at random. Find the probability that the child takes less than
95 seconds to solve the puzzle.
[2 marksJ
(fhis question continues on the following page)
t8
