In a survey , 200 students were asked what infuenced them most to buy their latest CD.The results are. Radio 9/20, Friends 3/20, Saw in shop 1/10, Music vedeo channel 2/25, Live performance 7/100, Other 3/20.
How many less students were influenced by live performance than by a music vedeo channel.
A. 14
B. 16
C. 2
D. 30
How many more students were infuenced by radio than by a friend.
A. 30
B. 90
C. 60
D. 120
How many students said radio influenced them most ?
A. 45
B. 90
C. 9/20
D. 180
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Answer:
Given:
Number of students = 200
Formula Used\Theory:
Multiplying of ratio of each part and total value gives out
Value of each part
(a) The number of students influenced by radio is =
Ratio × total number of students
= × 200
= 9 × 10
= 90students
(b) Number of students influence more by radio than music video channel
= difference of ratio × number of students
= () × 200
= () × 200
=
= 37 × 2
= 74 students
(c) Number of students influence by friends and relatives
= Ratio × total number of students
= × 200
= 3 × 10
= 30
Number of students heard CD in a shop = Ratio × total number of students
= × 200
= 20 students
Step-by-step explanation:
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