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# Quant Question of the Day Chat

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Re: Quant Question of the Day Chat [#permalink]
for this , you have to see the number of solutions for the equation , y=( x^2-x)(x-2). This eq can be rearranged as (x)(x-1)(x-2) by taking x common from x^2-x ......... now we can clearly see that equation y= (x)(x-1)(x-2) has three solutions 0,1,2 .. so graph that cuts x-axis at three points 0,1,2 will be the best representation of the function y

option ’d’ will be the answer
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Re: Quant Question of the Day Chat [#permalink]
When x is between 0 and 1, y is positive which is shown in graph D
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Re: Quant Question of the Day Chat [#permalink]
There is a 10% chance of rain on a particular day. If it rains, there is a 10% chance _ that Jfon will go to school, out if it does not rain, he wil definitely go to school. What is the probability that Jon will go to school?
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Re: Quant Question of the Day Chat [#permalink]
D.
Why not C? Easy to test. Take a value beyond x = 2. Say x = 5.
When x = 5, y = (5)(5-1)(5-2) = 5*4*3 = a +ve value. For choice C, the y value for an x=5 is negative. Choice D is correct.

Do check out "wavy line method". The concept will be useful in this regard, I believe.

Should be "wavy curve", I guess
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Re: Quant Question of the Day Chat [#permalink]
PrabhatKC wrote:
There is a 10% chance of rain on a particular day. If it rains, there is a 10% chance _ that Jfon will go to school, out if it does not rain, he wil definitely go to school. What is the probability that Jon will go to school? How to solve this usinf table? Or can this not be solved using table? Please help

The question can be solved using table too.
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Re: Quant Question of the Day Chat [#permalink]
My attempt. Hope this is correct.
Manager
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Re: Quant Question of the Day Chat [#permalink]
guys can anyone make a separate chat for GRE
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Re: Quant Question of the Day Chat [#permalink]
y=(x^2-x)(x-2)=x(x-1)(x-2). So, y will be 0 when x=0,1, and 2, that is the curve will cut graph at 0, 1 and 2. Only C and D left........... Next, when x>2, all three x, x-1 and x-2 will be positive, and product of three positive is positive. Thus after cutting x-axis at 2, the line should give y as positive always..... OR You could just take x as 3, and see that y=3*1*2=6. D gives you positive value while C gives a negative value for y at x=3...answer is D
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Re: Quant Question of the Day Chat [#permalink]
for rest GMAT students, Alex these questions are confusing and not important
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Re: Quant Question of the Day Chat [#permalink]
aayushimehta12 is correct. The questions could be posted in GRE forum.
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Re: Quant Question of the Day Chat [#permalink]
Thank you, because the entire time I am looking at questions and being confused is this are and gmat, am I supposed to know the answer or not

so Nitish and Alex, requesting you to please post these questions elsewhere
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Re: Quant Question of the Day Chat [#permalink]
Just opened a new chat on GRE. Please post Quant questions/queries here mchat.php?room_id=50050793&invite=gDTbu4XAMJEh6csH9KGx0CPSIymZBFrOvap2q5YnLRNdel1kzoQit73WUjV8wf
Manager
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Re: Quant Question of the Day Chat [#permalink]
Sorry for that actually my xm is near
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Re: Quant Question of the Day Chat [#permalink]
HarshR9 wrote:
My attempt. Hope this is correct.

i am also getting 91
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Re: Quant Question of the Day Chat [#permalink]
Math Expert
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Re: Quant Question of the Day Chat [#permalink]