Question

A raffle ticket consist of 20 prizes. The first prize is 25000 pesos and each successive prize is 500 pesos less than the preceding prize. What is the total prize of the raffle ticket?​

Answer 1

0.9 each ticket of raaffle sucvessuve

Answer 2

Answer:

The total prize is of 405000

Step-by-step explanation:

first prize=a= 25000

second prize=24500

Thus it forms an AP

d= 24500-25000

= -500

no. of terms=n=20

We have to find total prize

So, we have to find Sn

$sn = \frac{n}{2} (2a + (n - 1)d)$

Sn= 20/2 (2×25000+(20-1)-500)

$sn = 10(50000 - 19 \times 500)$

$sn = 10(50000 - 9500)$

$sn = 10(40500)$

$sn = 405000$

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