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Primary 4 | Maths
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Can please kind teacher help me solve these 2 problem sum , thank you very much
Date Posted: 4 years ago
Views: 403
We must list down as many letterings as we can.
AA AB AC AD
BA BB BC BD
CA CB CC CD
DA DB DC DD
so 16 sections can be marked this way.
Case 1
T --> cleaning table
A --> mopping floor
V --> emptying waste paper
Case 2
T --> cleaning table
A --> emptying waste paper
V --> mopping floor
Case 3
T --> mopping floor
A --> cleaning table
V --> emptying waste paper
Case 4
T --> mopping floor
A --> emptying waste paper
V --> cleaning table
Case 5
T --> emptying waste paper
A --> cleaning table
V --> mopping floor
Case 6
T --> emptying waste paper
A --> mopping floor
V --> cleaning table
So there are 6 different ways.
AA AB AC AD
BA BB BC BD
CA CB CC CD
DA DB DC DD
so 16 sections can be marked this way.
Case 1
T --> cleaning table
A --> mopping floor
V --> emptying waste paper
Case 2
T --> cleaning table
A --> emptying waste paper
V --> mopping floor
Case 3
T --> mopping floor
A --> cleaning table
V --> emptying waste paper
Case 4
T --> mopping floor
A --> emptying waste paper
V --> cleaning table
Case 5
T --> emptying waste paper
A --> cleaning table
V --> mopping floor
Case 6
T --> emptying waste paper
A --> mopping floor
V --> cleaning table
So there are 6 different ways.
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