HKDSE-MATH - 2020 - Paper 2 -

Ans: A
Note that there are $28$ students in the distribution

Ans: A
Since the range is $9$, then we have $3 \le m, n \le 9$.

I m

Ans: A
Let $x$ and $y$ be the two test scores, where $xy$. Let $

Ans: C
The mean of the six numbers

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Ans: (a) $28$ (b) Range $=5$, inter-quartile range $=2$, st

Ans: (a) $3$ (b) No (c) (i) $42$ (ii) $11$ (iii) $10$

1. The mean

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Ans: B

The inter-quartile range

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Ans: A

Let $\mu$ be the mean of the remaining $40$ integers.

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Ans: C

Let $\sigma$ be the standard deviation of the examina

Ans: B

Let $a$ and $d$ be the first term and the common differe

Ans: (a) $a=2$, $b=1$ (b) (i) No (ii) $7.16$

1. Note that there a

Ans: A

Let $x\text{ kg}$ be the mean weight of the actresses.

Ans: B

Since the median of the integers is $6$, then $x \ge 6$.

Ans: C

The new median $x$

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Ans: D

I is not true. The mean of $S_1$

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Ans: (a) Median $=2$, inter-quartile range $=2$, variance

Ans: C

Note that the upper quartile of the distribution is th

Ans: A

The mean salary

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