## Bharat Gupta is teaching live on Unacademy Plus

COMBINATION Practical Problem part - 5 Follow Upvote

Problem for this lessor In a plane there are 37 straight lines, of which 13 pass through the point A and 11 pass through the point B. Besides, no three lines pass through one point, no line passes through both points A and B, and no two are parallel. Find the number of points of intersection of the straight lines. a. 540 b. 525 c. 535 d. 542 From a class of 25 students, 10 are to be chosen for an excursion party. There are 3 students who decide that either all of them will go or none of them will go. In how many ways can this be done? a. 823190 b. 817190 . 831290 d. 811290 In how many ways can 21 identical books on English and 19 identical books on History be placed in a row on a shelf so that two books on History may not be together? a. 1440 b. 1280 c. 1540 d. 1360 A parallelogram is cut by two sets of 5 parallel lines to its sides. Find the number of parallelogram thus formed? a. 420 b. 441 c. 315 d. 360

In a plane there are 37 straight lines, of which 13 pass through the point A and 11 pass through the point B. Besides, no three lines pass through one point, no line passes through both points A and B, and no two are parallel. Find the number of points of intersection of the straight lines. a. 540 b. 525 c. 535 d. 542

In a plane there are 37 straight lines, of which 13 pass through the point A and 11 pass through the point B. Besides, no three lines pass through one point, no line passes through both points A and B, and no two are parallel. Find the number of points of intersection of the straight lines. a. 540 b. 525 c. 535 d. 542 2.

In a plane there are 37 straight lines, of which 13 pass through the point A and 11 pass through the point B. Besides, no three lines pass through one point, no line passes through both points A and B, and no two are parallel. Find the number of points of intersection of the straight lines. a. 540 b. 525 c. 535 d. 542 nlo = 2. DI

In a plane there are 37 straight lines, of which 13 pass through the point A and 11 pass through the point B. Besides, no three lines pass through one point, no line passes through both points A and B, and no two are parallel. Find the number of points of intersection of the straight lines. a. 540 b. 525 C. 535 d. 542 2 No

From a class of 25 students, 10 are to be chosen for an excursion party. There are 3 students who decide that either all of them will go or none of them will go. In how many ways can this be done? a. 823190b. 817190c. 831290 d. 811290

From a class of 25 students, 10 are to be chosen for an excursion party. There are 3 students who decide that either all of them will go or none of them will go. In how many ways can this be done? a. 823190b. 817190c. 831290 d. 811290 Co-I wot Fo

From a class of 25 students, 10 are to be chosen for an excursion party. There are 3 students who decide that either all of them will go or none of them will go. In how many ways can this be done? a. 823190b. 817190c. 831290 d. 811290 Co-I 2 not

From a class of 25 students, 10 are to be chosen for an excursion party. There are 3 students who decide that either all of them will go or none of them will go. In how many ways can this be done? a. 823190b. 817190c. 831290 d. 811290 ved ano Co-I lo 2 ON not

In how many ways can 21 identical books on English and 19 identical books on History be placed in a row on a shelf so that two books on History may not be together? a. 1440 b. 1280 c. 1540 d. 1360 o ks

In how many ways can 21 identical books on English and 19 identical books on History be placed in a row on a shelf so that two books on History may not be together? a. 1440 b. 1280 c. 1540 d. 1360 ia* first

A parallelogram is cut by two sets of 5 parallel lines to its sides. Find the number of parallelogram thus formed? a. 420 b. 441 c. 315 d. 360

A parallelogram is cut by two sets of 5 parallel lines to its sides. Find the number of parallelogram thus formed? a. 420 b. 441 c. 315 d. 360

A parallelogram is cut by two sets of 5 parallel lines to its sides. Find the number of parallelogram thus formed? a. 420 b. 441 c. 315 d. 360

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