Answer:
153 coins will be there.
Step-by-step explanation:
The number of coin in the bottom row / or last row = 17
The number of coins in the second last row = 16
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The number of coins in the second row = 2
The number of coins in the first row = 1
So the total number of coins = (Number of coin in the first row) + (Number of coins in the second row) + (Number of coins in the third row) + ....... + (Number of coins in the last row / seventeenth row)
Total number of coins = 1+2+3+....+16+17
Total number of coins = [tex]\frac{17\times(17+1)}{2}=\frac{17\times18}{2}=17\times9=153[/tex]
(NOTE: Sum of first n natural number = [tex]\frac{\boldmath n\times(n+1)}{2}[/tex])
