00:01
Hello, i am your teacher for this question and our question says that in a group of 30 people, 15 run, 13 swim, 13 cycle, 5 run and swim, 8 cycle and swim, 9 run and cycle and 5 do all of the 3 activities.
00:16
How many of the 30 people neither run nor cycle? so how are we going to solve this question in a group of 30 people? all right.
00:25
There are in all 30 people.
00:28
Now i will be drawing the venn diagram for this to understand by you in a very good manner.
00:38
So just see that we have these three circles, this is for run, this is for swimming, and then and after cycle, so this is for cycle.
00:54
Alright, then you have a, b, c, d, e, f, g, h as all the areas.
01:01
All right.
01:02
Now just see that 15 run.
01:05
15 run means a plus b plus d plus e is 15.
01:12
Then it is written 13 swim, 13 cycles.
01:15
So 13 swim, 13 cycles to be plus c plus e plus f.
01:20
13 are swim.
01:22
All right.
01:23
Then d, e, f, g, do the cycling.
01:29
So that is 13 again.
01:30
Then and after 5 run and swim 5 run and swim so that is b plus e that is 5 after that 8 cycle and swim so 8 do the cycling and swimming both so e plus f that is 8 according to this given question swim and cycle and then and after 9 run and cycle so 9 do the run and cycle so so, d plus e is written as 9 and then you can see that and 5 do all three activities.
02:10
So 5 do all three activities that is e.
02:13
E is 5 now.
02:15
So e is value is 5.
02:17
So you will be finding that we can write with the help of e...