Aptitude Overflow
Ask us anything
Toggle navigation
Aptitude Overflow
Facebook Login
Google Login
or
Email or Username
Password
Remember
Login
Register

I forgot my password
All Activity
Questions
Unanswered
Tags
Subjects
Users
Ask
Blogs
Exams
obtaining head in coin
+3
votes
52
views
A coin is tossed 10 times Find the probablity of obtaining head at least once
probability
asked
Dec 24, 2017
in
Quantitative Aptitude
by
Uma Maheswari
(
262
points)
●
5
●
25

52
views
Facebook
Google+
Twitter
answer
comment
Please
log in
or
register
to add a comment.
Please
log in
or
register
to answer this question.
2
Answers
+2
votes
Best answer
Probability of obtaining head at least once = 1  ( Probability of obtaining tail all 10 times)
= 1  (1/2)^10
= 1023/1024
Therefore , probability is 1023/1024
answered
Dec 24, 2017
by
sravani inturi
(
150
points)
●
4
selected
Jan 31
by
Sukanya Das
comment
Please
log in
or
register
to add a comment.
+2
votes
Sample space size $= 1024$
No. of favourable cases $= 10241=1023$
Probability $= \frac{1023}{1024} =99.90 \%$
answered
Dec 24, 2017
by
saxena0612
(
864
points)
●
2
●
16
comment
Please
log in
or
register
to add a comment.
← Prev. Qn. in Cat.
Next Qn. in Cat. →
← Prev.
Next →
Related questions
+1
vote
0
answers
1
A^B refers to A raised to the power B.Ten tickets numbered 1, 2, 3, ..., 10. Six tickets are selected at random one of a time with replacement. The probability of the largest number appearing on the selected ticket is 7 is
asked
Oct 2, 2017
in
Quantitative Aptitude
by
flash
(
20
points)
●
1
●
2

217
views
probability
quantitativeaptitude
combinatory
0
votes
1
answer
2
tcs aptitude
There are two bags. One bag contains 4 white and 2 black balls. Second bad contains 5 white and 4 black balls. 2 balls are transferred from first bag to second bag. Then one ball is taken from the second bag. The probability that the ball is white is ? 42/33 5/16 48/13 19/33
asked
Sep 15, 2016
in
Quantitative Aptitude
by
__
(
456
points)
●
3
●
14
●
24

103
views
quantitativeaptitude
probability
0
votes
1
answer
3
probability
When 4 dice are thrown, what is the probability that the same number appears on each of them? a. 1/36 b. 1/18 c. 1/216 d. 1/5
asked
Sep 7, 2016
in
Quantitative Aptitude
by
__
(
456
points)
●
3
●
14
●
24

41
views
probability
dice
+3
votes
1
answer
4
It is known that a bus will arrive at random at a certain location sometime between 3:00 P.M. and 3:30 P.M.
asked
Jul 14, 2015
in
Quantitative Aptitude
by
Arjun
(
7.4k
points)
●
50
●
66
●
105

394
views
probability
+1
vote
1
answer
5
The Head Quarter of the International Court of the Justice is located in
asked
May 5, 2015
in
General Awareness
by
admin
(
1.8k
points)
●
27
●
78
●
120

78
views
generalawareness
All categories
Logical Reasoning
770
English Language
908
Quantitative Aptitude
987
General Awareness
89
Computer Knowledge
53
Others
0
Recent Posts
GRE Exam: New Test Pattern 2016 – 2017
Raise your Visibility to Attract GRE Test Takers
GRE Quantitative Practice Questions
GRE Practice Questions — Quantitative Reasoning
Sentence Equivalence Questions (GRE)
Aptitude Overflow
Most popular tags
englishlanguage
quantitativeaptitude
logicalreasoning
passagereading
cat1997
cat1995
cat1996
cat1998
cat1999
cat2000
cat20031
cat2001
cat20032
cat2002
cat2004
datainterpretation
cat2005
cat2008
cat2014
cat2006
sequences&series
cat2007
cat1994
multiplesubparts
verbalability
computerknowledge
tabulardata
generalawareness
appropriateword
nielitdec2017scientifictechnicalassistanta
sentenceformation
cat2009
timeanddistance
wordpairs
paragraphconstruction
percentage
graphs
barscharts
nielitdec2017scientistb
sentencerearrangement
oddoneout
ratioproportion
someallnone
worktime
profitloss
geometry
filltheblank
syllogism
factjudgemeantinference
datasufficiency
decisionmaking
codingdecoding
permutation
statementsufficiency
functions
statementsconclusions
difficult
easy
mostappropriatealternative
combinatory
roundtablearrangement
banks
factors
excelability
triangle
sets
piechart
lcmhcf
clocks
equations
gameplayer
fractions
probability
speeddistance
cmi2010
twoblankword
numberseries
quadraticequations
abbreviations
awards
direction
logarithms
minimummaximum
cubes
costpricesellingprice
mixtures
relations
bankindia
mailing
wordability
codes
area
average
circle
relationship
files
solids
collinier
interestspayments
nielit
2,807
questions
1,179
answers
441
comments
40,069
users