[bhavin422]

Originally Posted by nuttyvarun

Yesterday Diana spent a total of 240 minutes attending a training class, responding to Emails, and talking on the phone. If she did no two of these three activities at the same time, how much time did she spend talking on the phone?

(1) Yesterday the amount of time that Diana spent attending the training class was 90 percent of the amount of time that she spent responding to E-mails.
(2) Yesterday the amount of time that Diana spent attending the training class was 60 percent of the total amount of time that she spent responding to E-mails and talking on the phone.

tri variate ..we need 3 independent equations
Let E-mail = E ; training class = C; phone =P


St 1 : If E = x then T = 0.9x : P = 240 -1.9x ..just 1 more eq ..not suff

St 2 : gives u only 1 eq ...not suff

Combined : 0.9x = 0.6 (x + 240 - 1.9x)...linear eqn in X ...suff ..
we can get all corr values ...

Ans C

[sheorp]

Originally Posted by nuttyvarun

What is the cube root of

w ?

(1) The 5th root of

w is 64.
(2) The 15th root of w is 4.

the OA is option B.. how come..??..

i tink ...ans sud be (D)

[bhavin422]

Originally Posted by nuttyvarun

What is the cube root of

w ?

(1) The 5th root of

w is 64.
(2) The 15th root of w is 4.

the OA is option B.. how come..??..

I think the answer should be D ..

[nuttyvarun]

Originally Posted by bhavin422

tri variate ..we need 3 independent equations
Let E-mail = E ; training class = C; phone =P


St 1 : If E = x then T = 0.9x : P = 240 -1.9x ..just 1 more eq ..not suff

St 2 : gives u only 1 eq ...not suff

Combined : 0.9x = 0.6 (x + 240 - 1.9x)...linear eqn in X ...suff ..
we can get all corr values ...

Ans C

I also marked option C only.. but OA seems to be D.. I am utterly confused, bcoz stmt 1 cannot be used to solve this..

u wanna try again and see if option D can be the answer..

[nuttyvarun]

so wats the final take on this one.. option C or option E

Originally Posted by nuttyvarun

well.. for me it goes something like..

option1:
possibly X is +ve or -ve..
and
for sure X <> ZERO

option2:
possible X is zero or -ve
and
for sure X <> +ve

combining 2 we get..for sure X <> ZERO and for sure X <> +ve

thus answer can be reached with the help of both statements...

remember this is a YES/NO answer..and using the statement provided the answer can be reached, i.e. YES.

my asnwer choice still remains option C

Originally Posted by bhavin422

well..

St 1 : x is +ve or -ve
St 2: x. |Y| is not a positive number implies product is 0 or -ve

possibilities:
a) X=0 and Y is any no
OR
b) x= any real no and y = 0
OR
c) x= -ve and y = any no

combined statements :

It tells us x is not zero ...so option a) of St 2 is gone ...
But still we cannot rule out option b and c of statement 2 ..

Or in other words, x can be any real no (which includes positive no) Or -ve ..still no concensus whether x is -ve ...

Hence E ..

I guess this should be correct

[bhavin422]

Originally Posted by nuttyvarun

I also marked option C only.. but OA seems to be D.. I am utterly confused, bcoz stmt 1 cannot be used to solve this..

u wanna try again and see if option D can be the answer..

did give it a thought again ...D simply is not poss

We know total of 3 is 240

St 1 : email is x and class is 0.9x , thats all, phone would depend on the value of x which is variable ,,,not suff ..

Ans should be C only !!

[bhavin422]

Originally Posted by nuttyvarun

well.. for me it goes something like..

option1:
possibly X is +ve or -ve..
and
for sure X <> ZERO

option2:
possible X is zero or -ve
and
for sure X <> +ve

combining 2 we get..for sure X <> ZERO and for sure X <> +ve

thus answer can be reached with the help of both statements...

remember this is a YES/NO answer..and using the statement provided the answer can be reached, i.e. YES.

my asnwer choice still remains option C

Originally Posted by nuttyvarun

so wats the final take on this one.. option C or option E

he he ...i thought i had posted back ...serious connectivity issues on my end :(

well, am not really sure what u wanted to convey thru bold statement ...but i guess u meant x is a non zero number i.e it can be positive or negative ..

And yes, we do do not need a definite value, but a definite yes that x is =ve OR a definite no that x is non negative ..

Since x can either be positive or negative, there is no definite stance, and hence insufficient ..

I maintain my Ans as E ..

I guess lets wait for OA before somebody groans for spamming

[nuttyvarun]

humm.. seems ur internet conn sux as much as my maths

btw referring to the highlighted section in ur post below.. I think both statements ensure that its not zero and positive.. so u r not left with any other option but negative..

anyway.. guess we both would have to wait till the OA is disclosed..

Originally Posted by bhavin422

he he ...i thought i had posted back ...serious connectivity issues on my end :(

well, am not really sure what u wanted to convey thru bold statement ...but i guess u meant x is a non zero number i.e it can be positive or negative ..

And yes, we do do not need a definite value, but a definite yes that x is =ve OR a definite no that x is non negative ..

Since x can either be positive or negative, there is no definite stance, and hence insufficient ..

I maintain my Ans as E ..

I guess lets wait for OA before somebody groans for spamming

[Mcnabb_ISB]

Originally Posted by nuttyvarun

What is the cube root of

w ?
(1) The 5th root of w is 64.

(2) The 15th root of w is 4.

the OA is option B.. how come..??..

is it D? :(

[guy with guts]

Originally Posted by Mcnabb_ISB

is it D? :(

x/3=5*x/15
taking cos and sin of both sides-
cosx/3+i sinx/3=cos5*x/15+i sin 5*x/15
=(cosx/15+i sinx/15)^5
=4^5

hence answer is B only.
here 5 can be taken as power bcoz its an integer.