Daily Practice

Higher Plus

9th October 1977

5 questions · 13 marks · Grades 8-9 · 51 question types in this band

1
Probability Equation Questions3 marks
A bag holds 10 counters, r of them red. Two are taken without replacement and P(both red) = 28/45. Work out r.
2
Histograms3 marks
On a histogram the bar for 0 < x <= 10 has a frequency density of 0.4. How many values are in that class?
3
Bounds3 marks
x = 78 and y = 51, each correct to the nearest whole number. Work out the upper bound of x - y.
4
Trigonometric and Exponential Graphs2 marks
The curve y = sin x° is drawn for 0 <= x <= 360. Write down the value of y when x = 0.
5
Velocity Time Graphs2 marks
A train slows steadily from 22 m/s to rest in 8 seconds. Work out its deceleration.

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