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a few understand it you check that again
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❤️ Method 1 ❤️
let he was absent for x days.
A/q,
120(20-x)-10x = 1880
2400-120x-10x = 1880
520x = 130x
x = 4 days ... (Ans)
❤️ Method (2) ❤️
Let he was present for all 20 days .
than he would earn = 20*120 = 2400
and if he was absent for all 20 days ,
he loose = 20*10 = -200
now, by alliagtion rule ::--------
2400 -200
1880
(1880-(-200) :(2400-1880)
= 2080:520
= 4:1
so, he was present for = 20*4/5 = 16 days .
and absent for = 20*1/5 = 4 days (Ans)
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