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# S1 question maths Watch

1. I need serious help with this question.
2. question B and C i need help in
3. (Original post by patterson)
question B and C i need help in
Are you happy with the area being proportional to the frequency?
4. (Original post by patterson)
I need serious help with this question.
(b) Freq Density x class width = 5 x 20 = 100
(c) Same formula again but apply to 3 rectangles
8.6x10=86 (is it pointing to 8.6?)
6x10=60
5x20=100
Total = 246
5. b) Number of students between 60 and 70 seconds is 90. 10 x 6 = 60. 90/60 = 1.5 = k

Now for the 40-60 bar, 20 x 5 = 100

Since k is 1.5 we have to do 100 x 1.5 = 150

c) (8.6x10) + (6x10) + (5x20) = 246

x 1.5 = 369

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