5•5=25 EXPLANATION: repeated addition of 5+5+5+5+5=25
It would be a positive correlation because they had to do 1 or more years and they can't do negative years.
Two teams can be selected out of 10 teams in C(10,2) = 10!/8! 2! = 45 ways
=> If each team plays exactly 3 matches with each other team, number of matches will be 45 x 3 = 135.
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I got this answer from someone else but it should answer your question for you
About an hour and 7 minutes is remaining
If the angles of the triangle are 50, 90, 40 degrees, then only 1 triangle can be made. Because if you change the sides, the angles would change
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