On the occasion of deepawali festival ea...

On the occasion of deepawali festival each student of a class sends greetings cards to one another if the postman deliver 1640 greeting cards to the students of this class then the number of students in the class is

Text Solution

Verified by Experts

The correct Answer is:

Topper's Solved these Questions

PARABOLA, ELLIPSE AND HYPERBOLA
PATHFINDER|Exercise QUESTION BANK|66 Videos
PERMUTATION AND COMBINATIONS
PATHFINDER|Exercise QUESTION BANK|81 Videos

Similar Questions

Explore conceptually related problems

On the occasion of Dipawali festival each student of a class sends greeting cards to others. If there are 20 students in the class, the number of cards sends by students is

The distribution below gives the weights of 30 students of a class. Find the median weight of the students.

Proportion of girls in a class of 100 students is

Today is the Foundation day of our school. Each student of class five will be given pencil and eraser worth 5 rupees. Each student of class six will be given compass worth of 10 rupees. There are x students present in class five, but number of students present in class six is 8 less than the number present in class five. Calculate the amount of money spent for pencils and erasers and also the amount spent for compasses.

The number of students in a class is 60 . The average of the ages of the boy-students is 14.5 years and the average of the ages of the girl-students is 16 years . If the collective average of the total students be 15 years , then find the number of boy-students and the number of girl-students.

In Noorjahan's class 30% of the students are girls. There are 60 students in the class. Let's calculate to find the number of boys in Noorjahan's class.

0.23 parts of students of our class are girls. Let's find the percentage of girl students out of all the student of our class.

An educational trip to Gadiyara had been arranged by our school for collection environment related date. 32 studens of class six, 36 students of class seven and 28 students of class eight are going for the trip, few small school buses have been arranged so that each bus must accoumodate equal number of studentsfrom the three classes. Let us find ,total number of buses required and number of students each but will accomodate.

A class has n students we have to form a team of the students including at least two students and also excluding atleast two students the number of ways of forming the team is

Each x students of class V is given y books. But each x students of class VI is given (y+3) books. Again each (x+11) students of class VII is given (y+10) books. Calculate to find, how many books were given to the students of class V, VI and VII. Also find the total number of books given out in their classes.

PATHFINDER-PERMUTATION AND COMBINATION-QUESTION BANK

If a,b,c,d are odd natural numbers such that a+b+c+d=20 then the numbe...
Text Solution
|
The value of.^50c4+underset(r=1)overset6sum.^(56-r)c3 is
Text Solution
|
On the occasion of deepawali festival each student of a class sends gr...
Text Solution
|
The set S:={1,2,3…..12} is to be partitioned into three sets A,B,C of ...
Text Solution
|
From 6 different novels and 3 different dictionaries 4 novels and 1 di...
Text Solution
|
A servant has to post 5 letters and there are 4 letter boxes in how ma...
Text Solution
|
In how many ways 5 delegates can be put in 6 hotels of a city if there...
Text Solution
|
How many different words can be formed with the letters of the word "M...
Text Solution
|
If .^(n-1)c3+^(n-1)c4gt^nc3 then n is greater than
Text Solution
|
The number of ways in which three distinct numbered in an increasing A...
Text Solution
|
The number of permutations of the letters of the word ENDEANOEL taken ...
Text Solution
|
There are 4 letters and 4 directed envelopes the number of ways in whi...
Text Solution
|
Let E={1,2,3,4},F={1,2} then the number of onto functions from E to F ...
Text Solution
|
The number of 5 digits numbers that contain 7 exactly once is
Text Solution
|
Number of 4 digit numbers which are divisible by 4 that can be formed ...
Text Solution
|
The number of ways of painting the faces of a cube with six different ...
Text Solution
|
Find the number of words which can be made from letters of the word IN...
Text Solution
|
Sanjay has 10 friends among whom two are married to each other she wis...
Text Solution
|
There are n seats round a table marked 1,2,3,…..n the number of ways i...
Text Solution
|
The number of ways in which 10 candidates A1,A2,….A10 can be ranked so...
Text Solution
|