CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Six Xs have to be placed in the square of the figure such that each row contains at least one 'X'. In how many different ways can this be done?
473607_a787a31ceaed4525a4e395dbd15c7518.png

A
27
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
28
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
26
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
35
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B 26
In all, we have 8 squares in which six X have to be placed and it can be done in 8C6=28 ways.
But 'this includes the possibility that either the top or horizontal row does not have any X. Since, we want each row must have at least one X, these two possibilites are to be excluded. Hence, required number of ways =282=26

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Introduction
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon