AC Lim's answer to Owen's Primary 6 Maths Data Analysis Singapore question.

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AC Lim
Ac Lim's answer
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1st
$4×4 =16u
$5×1 = 5u
21u → 252
1u → 12
Guests received $4 vouchers = 4u
= 4×12
= 48 guests.
Hope this helps