In ∆ABC to the right, what is the value of y? (1) AB = AC (2) x = 30

Question

https://gmatclub.com/forum/download/file.php?id=35940 In ∆ABC to the right, what is the value of y? (1) AB = AC (2) x = 30 2017-06-24_1943.png

rohit8865 · Answer

(1) ∆ABC can be isosceles or equilateral
not suff

(2) y can be any thing < 150
insuff

combining ∆ABC is isosceles with x =30 & y=z
as y+z =150
y=75

Ans C

amanvermagmat · Answer

We should not do the mistake of assuming that this is a right angled triangle, even if it looks like one.

Answer can only be found by combining both the statements, as explained above by rohit8865

ydmuley · Answer

In ∆ABC to the right, what is the value of y?

(1) AB = AC

Means this is Isosceles Triangle

2y + x = 180

However, in order to determine value for y we need to know at least x or z angle.

Hence, (1) is  =====> NOT SUFFICIENT

(2) x = 30

This gives us value of x, however, we cannot determine the value of y and z based on this

Hence, (2) is  =====> NOT SUFFICIENT

Now, lets combine (1) & (2)

x = 30

2y + x = 180

2y + 30 = 180

2y = 150

y = 75

Hence, Answer is C

goalMBA1990 · Answer

Can someone please clarify the statement "In ∆ABC to the right"? Is it same as triangle ABC is right angle triangle?

T700ISB · Answer

No. Nowhere it is mentioned that triangle ABC is a right angled triangle.

Tri ABC to the right simply means that the Figure in the problem is at the right hand side.

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