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19 Jul 2020, 02:11
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the flaw in your approach is explained in the sketch
WhatsApp Image 2020-07-19 at 2.40.00 PM.jpeg [ 163.76 KiB | Viewed 1676 times ]
sidship21
Attachment:
WhatsApp Image 2020-07-19 at 2.40.00 PM.jpeg [ 163.76 KiB | Viewed 1676 times ]
yashikaaggarwal
Senior Moderator - Masters Forum
Joined: 19 Jan 2020
Last visit: 10 Aug 2026
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Schools: Cranfield (A) Warwick MiM "23 (M)
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19 Jul 2020, 02:14
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sidship21 We can't change the signs as per our wish. Values can only be put when we are sure of that equating that X is equal to A , neither greater than nor less than sign is of any use
Let's say
X+Y = 50
And Y>30
Where X and Y are positive integers.
You can't put >30 in x+y=50
But can assume a value.
Let Say Y = 31
And X will be 19.. And other possible ordered pair.
Or 50-x > 30
20 > x
Then also it will give value of x ranging from 19 to 1
We need to be sure that one thing is definitely satisfying a value which can be substituted
Posted from my mobile device
Let's say
X+Y = 50
And Y>30
Where X and Y are positive integers.
You can't put >30 in x+y=50
But can assume a value.
Let Say Y = 31
And X will be 19.. And other possible ordered pair.
Or 50-x > 30
20 > x
Then also it will give value of x ranging from 19 to 1
We need to be sure that one thing is definitely satisfying a value which can be substituted
Posted from my mobile device
19 Jul 2020, 02:31
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Thanks a lot GMATBusters and yashikaagarwal, for such prompt responses! I fully understand where I faultered, thanks to you both.
