Math Is Fun Forum

  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

#151 Help Me ! » another dice problem » 2011-12-24 02:28:54

juantheron
Replies: 4

A die is rolled 10 times.Find the no. of outcomes in which at least one die shows 3.

#153 Help Me ! » ticket countability » 2011-12-24 02:13:47

juantheron
Replies: 1

A train going from Delhi to Jaipur stops at 7 intermediate stations.Five persons enter the train during the journey with five different tickets of the same class.how many different sets of tickets they could had

#154 Help Me ! » no. of points » 2011-12-24 00:52:20

juantheron
Replies: 9

find no. of points (x,y,z) in space whose each coordinate is a Negative Integer such that x+y+z+12 =0

#155 Re: Help Me ! » no. of parallelogram » 2011-12-24 00:50:39

anonimnystefy can you explain me

thanks

#156 Help Me ! » no. of parallelogram » 2011-12-24 00:23:23

juantheron
Replies: 5

no. of parallelogram that can be formed by using 4 parallel lines intersecting other set of 3 parallel lines

#157 Re: Help Me ! » dice problem » 2011-12-23 03:49:14

gAr and TheDude how can you get it

thanks

#158 Help Me ! » first digit » 2011-12-22 15:45:18

juantheron
Replies: 2

Select a non-negative integer n at random. What is the probability that the first digit of 2^n  is  a ``one'' (in base 10 notation)?

#159 Help Me ! » how many matrices » 2011-12-22 15:40:00

juantheron
Replies: 1

How many  matrices, A, are there such that all the entries of A are either 0 or 1,  exists, and all the entries of  are either 0 or 1?

#160 Help Me ! » dice problem » 2011-12-22 15:38:46

juantheron
Replies: 4

If I toss 4 dice, what is the probability that the product of the numbers is 36

#162 Help Me ! » 5 digit no » 2011-12-21 08:09:01

juantheron
Replies: 12

the no. of 5 digit no. that can be formed using the digit 0,1,2,3,4,5 that are divisable by 6 when repetition is not allowed is

#163 Help Me ! » gloves probability » 2011-12-21 07:50:37

juantheron
Replies: 1

there are 6 different pair of gloves . if 8 gloves are selected at random. then the probability that there are exactly two pairs is

#164 Help Me ! » sum of 4 digit no. » 2011-12-19 15:21:42

juantheron
Replies: 4

The sum of the different four-digit number is formed from the number 1, 2, 3, 4, 5

#165 Re: Help Me ! » middle one is perfect square » 2011-12-19 15:20:15

thanks to all

can any one explain me how can i get such no.

and their sum

#166 Re: Help Me ! » middle one is perfect square » 2011-12-19 05:14:26

yes you are saying right

Are you asking us to find all of the three digit numbers where the middle digit is a perfect square?  Like 142, the middle digit 4 is a square

#167 Help Me ! » middle one is perfect square » 2011-12-19 04:10:24

juantheron
Replies: 7

find three digit numbers in which the middle one is a perfect square are formed using the digits 1 to 9

and also find sum of their digits

#168 Help Me ! » probability in interval » 2011-12-18 16:20:40

juantheron
Replies: 9

If A and B are two events such that

and

Then

(i)

(ii)

(iii)

(iv)

#169 Re: Help Me ! » ball probability » 2011-12-18 16:16:20

i understand like this way

at least two ball drawn are green means two ball drawn are green + all three balls drawn are green

but not getting answer

answer is = 5/13

thank

#170 Re: Help Me ! » 8 digit no » 2011-12-18 16:14:14

thank bobbym

how can you get this

i have understand like that

if a no. is divisable by 8 then it has a factor 4.2

means no. is even and last two digit are divisable by 4

#171 Help Me ! » ball probability » 2011-12-18 16:11:59

juantheron
Replies: 6

A bag contain 8 red and 6 green balls. three balls are drawn one after another without replacement .
find the probability that at least 2 balls drawn are green

#172 Help Me ! » 8 digit no » 2011-12-18 15:41:58

juantheron
Replies: 5

If the eight digits 1, 2, 3, 4, 5, 6, 7, 8 are randomly permuted, what is the probability that the resulting eight-digit number is divisible by 8

#173 Re: Help Me ! » divisability probability » 2011-12-18 03:08:25

thank bobbym

but how can you get this

plz explain here

#174 Help Me ! » divisability probability » 2011-12-18 00:40:25

juantheron
Replies: 3

3 distinct integers are selected at random from 1 to 20. find the probability that their sum is divisible by 5.

#175 Re: Help Me ! » multiple choice question » 2011-12-18 00:18:59

means if any given objective question of 4 options

one or more answer is correct

answer for above question is given as options

(i) (1/15)^3      (ii) 1-(14/15)^3      (iii) 1/5       (iv) None of these

Board footer

Powered by FluxBB