HKDSE-MATH - 2015 - Paper 2 -

2015-II-27

Ans: A
Note that the sample space is as follow:

$\begin{arra

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2015

2015-II-28

Ans: B
The required probability

$\begin{array}{cl}
=

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2015

2015-II-43

Ans: C
The required number

$\begin{array}{cl}
= & P^6

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2015

2015-II-44

Ans: D
The required probability

$\begin{array}{cl}
=

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2015

2016-I-09

Ans: (a) $x=6$, $y=22$, $z=40$ (b) $\dfrac{2}{5}$

By compa

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2016

2016-I-15

Ans: $\dfrac{5}{42}$
$P(\text{no boys are next to each oth

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2016

2016-II-28

Ans: C
All possibilities are

$\begin{array}{llcl}
1.

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2016

2016-II-29

Ans: B
The expected number of tokens got

$\begin{array}{cl

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2016

2016-II-42

Ans: A
The required probability

$\begin{array}{cl}
=

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2016

2016-II-43

Ans: D
The required number

$\begin{array}{cl}
= & C^{

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2016

2017-I-07

Ans: (a) $x=40^\circ$ (b) $900$

Since the probability that

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2017

2017-I-11

Ans: (a) Median $=\$69$, standard deviation $=\$7.33$ (b)

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2017

2017-I-17

Ans: (a) $\dfrac{5}{3876}$ (b) $\dfrac{35}{969}$ (c) $\d

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2017

2017-II-28

Ans: C
The required probability

$\begin{array}{cl}
=

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2017

2017-II-42

Ans: B
The number of teams can be formed

$\begin{array}{cl}

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2017

2017-II-43

Ans: C
The required probability

$\begin{array}{cl}
=

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2017

2018-I-04

Ans: $7$
$\begin{array}{rcl}
P(\text{drawing a red ball}

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2018

2018-I-15

Ans: (a) $40320$ (b) $8640$

The required number
$\begin{ar

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2018

2018-II-28

Ans: A
Note that the sample space is

$\begin{array}{|c|c|c

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2018

2018-II-42

Ans: A
The required number

$\begin{array}{cl}
= & C^{

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2018