Students admitted (A) and who left (L) from five colleges P–T, 2016–2021 (all founded 2016). 2016 shows the number studying.

College	2016	2017 A	2017 L	2018 A	2018 L	2019 A	2019 L	2020 A	2020 L	2021 A	2021 L
P	2250	660	440	580	420	690	400	760	500	700	460
Q	2100	900	500	650	430	570	420	600	380	680	440
R	2400	840	460	800	500	720	450	680	480	820	560
S	3200	880	500	800	520	790	440	840	450	920	480
T	3100	700	450	760	460	820	440	880	420	850	430

If M and N represent the number of students admitted to Colleges S and Q respectively from 2017 to 2021, then M minus N equals

A830 ✓ Correct

B790

C870

D770

Correct answer: (A) 830

Explanation

The answer is 830.

College S admitted 880, 800, 790, 840 and 920, which total 4230.

College Q admitted 900, 650, 570, 600 and 680, which total 3400.

So M is 4230 and N is 3400.

The difference M minus N is 4230 minus 3400.

That equals 830.

So the answer is 830.

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