A group of 50 students were required to clear 2 tasks, one in rock-climbing and the other in bridge crossing during an adventure sports expedition. 30 students cleared both the tasks. 37 cleared bridge crossing, 38 students cleared rockclimbing. How many students could not clear any task?
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five students need not completed any task
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total student =50
30 student cleared both task
37 student cleared bridge crossing
student who cleared only bridge crossing
37 -30 =7
student who cleared only rock climbing
38-30 =8
number of student who clear only one
7+8 =15
total number of student who cleared any
30+15 =45
rest student =50-45 =5
30 student cleared both task
37 student cleared bridge crossing
student who cleared only bridge crossing
37 -30 =7
student who cleared only rock climbing
38-30 =8
number of student who clear only one
7+8 =15
total number of student who cleared any
30+15 =45
rest student =50-45 =5
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