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It supports mathematical functions (including trigonometric functions).
Current location：Mathematical operation > History of Mathematical Computation > Answer
Overview: 1 questions will be solved this time.Among them
☆1 arithmetic calculations
[1/1 Formula]
Work: Calculate the value of equation (C(4,2)*C(39,2)+C(4,3)*C(39,1)+C(4,1)*C(39,3))/C(43,4) .
Question type: Mathematical calculation
Solution:
(C(4,2)*C(39,2)+C(4,3)*C(39,1)+C(4,1)*C(39,3))/C(43,4)
=(6*C(39,2)+C(4,3)*C(39,1)+C(4,1)*C(39,3))/C(43,4)
=(6*741+C(4,3)*C(39,1)+C(4,1)*C(39,3))/C(43,4)
=(6*741+4*C(39,1)+C(4,1)*C(39,3))/C(43,4)
=(6*741+4*39+C(4,1)*C(39,3))/C(43,4)
=(6*741+4*39+4*C(39,3))/C(43,4)
=(6*741+4*39+4*9139)/C(43,4)
=41158/C(43,4)
=41158/123410
=0.333506
Answer:(C(4,2)*C(39,2)+C(4,3)*C(39,1)+C(4,1)*C(39,3))/C(43,4)=0.333506