Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 30 Jul 2014, 17:30

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

A person borrowed a certain sum at the rate of 20% per annum

Author Message
TAGS:
Intern
Joined: 01 Dec 2012
Posts: 39
Location: India
WE: Project Management (Retail)
Followers: 0

Kudos [?]: 12 [0], given: 10

The median of the series sin[m]1^{ [#permalink]  31 Jan 2013, 06:27
Q1. The median of the series sin1^{\circ}, sin2^{\circ}, sin3^{\circ},...............,sin179^{\circ} is

a. 1
b. 1/\sqrt{2}
c. sin46^{\circ}
d. sin89^{\circ}
e. sin98^{\circ}

Q2. If the Standard deviation of 1,2,3,4,5,6,7,8,9,10,11 is M, then the standard deviation of 101,102,103,...................,111 is
a. M
b. 100+M
c. 100-M
d. M-100
e. 100M

1.
[Reveal] Spoiler:
b

2.
[Reveal] Spoiler:
a
Senior Manager
Joined: 28 Apr 2012
Posts: 310
Location: India
GMAT 1: 610 Q49 V23
GMAT 2: 650 Q48 V31
GMAT 3: 770 Q50 V47
WE: Information Technology (Computer Software)
Followers: 10

Kudos [?]: 165 [0], given: 141

Re: The median of the series sin[m]1^{ [#permalink]  31 Jan 2013, 06:42
Q1. The median of the series sin1^{\circ}, sin2^{\circ}, sin3^{\circ},...............,sin179^{\circ} is

a. 1
b. 1/\sqrt{2}
c. sin46^{\circ}
d. sin89^{\circ}
e. sin98^{\circ}

Is this a GMAT question ?

Ans: B

sin function starts from sin0^{\circ} = 0 increases till sin90^{\circ} = 1 , then decreases till sin180^{\circ} = 0
and sinx^{\circ} = sin(180 - x)^{\circ}

So the mid value occurs at sin45^{\circ} or sin135^{\circ} = 1/\sqrt{2}

Q2. If the Standard deviation of 1,2,3,4,5,6,7,8,9,10,11 is M, then the standard deviation of 101,102,103,...................,111 is
a. M
b. 100+M
c. 100-M
d. M-100
e. 100M

Ans: A

Theory: The standard deviation remains unchanged if we add a constant to every term.
_________________

"Appreciation is a wonderful thing. It makes what is excellent in others belong to us as well."
― Voltaire

Press Kudos, if I have helped.
Thanks!

shit-happens-my-journey-to-172475.html#p1372807

Re: The median of the series sin[m]1^{   [#permalink] 31 Jan 2013, 06:42
Similar topics Replies Last post
Similar
Topics:
2 CI on a sum for 2 years @ 4% per annum is $102 .The SI on th 2 07 Feb 2014, 17:58 3 A bank offers an interest of 5% per annum compounded annua 9 11 Jun 2013, 02:58 A man invests Rs 5000 for 3 years at 50% per annum compound 3 09 Mar 2008, 10:00 7 A clock store sold a certain clock to a collector for 20 per 4 11 Jun 2007, 20:02 Lara borrowed$2400, and paid back at a rate of 2.5% per 2 07 Aug 2004, 06:01
Display posts from previous: Sort by