a) 960
b) 600
c) 800
d) 750
Answer: b
Explanation:
$$\eqalign{
& 78\% \,{\text{of}}\,\,750 + 34\% \,{\text{of}}\,x = 30\% \,{\text{of}}\,\,2630 \cr
& {\frac{{ {78 \times 750} }}{{100}}} + \frac{{34x}}{{100}} = \left( {30 \times 2630} \right) \times 100 \cr
& 78 \times 750 + 34x = 30 \times 2630 \cr
& 34x = 78900 – 58500 \cr
& x = \frac{{20400}}{{34}} \cr
& x = 600 \cr} $$
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