Percentages: WJEC GCSE Intermediate November 2022 Unit 2 Q10

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Intermediate November 2022 Unit 2 Q10

WJECIntermediateCurrent spec5 marksPercentages Solving Simple Equations

10.

(a) Express 21·76 as a percentage of 32. [2]

(b) Solve \(5t+3=3t+14\). [3]

Mark scheme (a)

Scheme	Marks	Comments
\(\dfrac{21{\cdot}76}{32}\) (× 100%) or equivalent	M1	Allow 0·68 to imply M1.
= 68 (%)	A1

Mark scheme (b)

Scheme	Marks	Comments
\(5t - 3t = 14 - 3\) OR \(3 - 14 = 3t - 5t\)	B1	FT until 2^nd error.
\(2t = 11\) OR \(-11 = -2t\)	B1
\(t = \dfrac{11}{2}\) or equivalent	B1	Mark final answer. Correct answer implies B1B1B1. Do not allow \(-t = -11/2\) or \(t = -11/{-2}\). A final answer of ‘11 ÷ 2’ is B1B1B0. If FT leads to a whole number answer, it must be shown as a whole number. Otherwise, accept a fraction. Allow B1B1B1 for a correct embedded answer BUT only B1B1B0 if contradicted by \(t \neq 11/2\) or equivalent.