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In a row of trees, a tree is 7th from left end and 14th from right end. How many tree are there in the row ?
Answer & Solution
Correct Answer:
Option
C
Total number of trees,
= 7+14-1
= 20
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It says 7 from left
Soo
1 2 3 4 5 6 7
And then 14 from right
20 19 18 17 16 15 14 13 12 11 10 9 8 7
So therefore 7 is counted twice
That's why subract 1
the total row is like
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
in the above row 7 is the position of left side and 7 is also a position of 14 to right side so ans will be 20