A family saves Php 1 000 in January, Php 1,200 in February, Php 1, 400 in March, and so on. How much will they save in one year? * A.25200 B.2500 C.22500 D.33000
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Step-by-step explanation:
let a = 1000
and d = 200
Then their monthly savings are like
a,a+d,a+2d.....
They form an a.p
now in one year = 12 months,
a12 = a+(12-1)d
= 1000+11(200)
= 1000+2200 = 3200
total savings in one year
s12 =12/2(a+a12)
= 6(4200) = 25200
please mark as brainliest if you understand ☺️
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