A television producer sold 150 televisions in a special 6-day sale offer. During the sale offer, each day the company sold 6 more televisions than what was sold the day before. How many televisions were sold on the 6th day?
Created: 6 years ago |
Updated: 3 years ago
best des
Sum = n/2 [ 2a + ( n – 1) d ]
বা, 150 = 6/2 [ 2 × x + ( 6 - 1) × 6 ]
বা, 300 = 6 [ 2x + 30 ]
বা, 300 = 12x + 180
বা, x = 10
Sell at 6th day = 10 + ( 6 - 1) 6 = 10 + 30 = 40
Md Azizur Rahman
Founder of Satt
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