Hi Jessica,

Following pls find my worked solution:

*** - for alignment purpose

Q1

M : F **Total

5 : 3 *** 8 -- (1)

C : MY Total

4 : 3 *** 7 -- (2)

Applying <Unchanged Total> concept {since total number of males (M), females (F) = total number chinese (C), malays (MY)}, multiply (1) 7x, (2) 8x.

M : F ** Total

35 : 21 ** 56 -- (3)

C : MY * Total

32 : 24 ** 56 -- (4)

Given there are 24 Malay members,

24u --> 24

1u --> 1

If there are 14 female malay members,

male malay members = 24 - 14 = 10

If there are 10 male malays and 14 female malays,

male chinese = 35 - 10 = 25

female chinese = 21 - 14 = 7

MC : FC

**25 : 7**

============

Q2

<before>

A : C

80 : 20

4 : 1

<process>

1920 spectators left

<after>

A: 75% of 80 = 60%

C: 40% of 20 = 8%

% of spectators who left:

100% - 68% = 32%

32% = 1920

Total (at first) = 100% = (1920 / 32) × 100

************** = **6000**

============

Trust the above helps.

Do let me know again if this is different from your Answerkey or if there's further clarification.

Cheers,

Edward