MATHS CLASS 10 AIRTHEMATIC PROGRESSION Q A.P.
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the amount she puts in piggy bank is in an ap.
1,2,3...31 since there are 31 days in January.
sum of the money she put in her piggy bank
s(n) = n/2*(first term + last term)
= 31/2*(1+31)
= 31/2*32
= 31*16
= 496
She also spent rupees 204 and had 100 rupees left with her.
Total pocket money= 496+204+100
= 800
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