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A student is allowed to select at most n-blocks from a collection of (2n + 1) books. If the total number of ways in which he can select a book is 63, find the value of n.Solution) Σ2n+1Cr,(from r=1 to r=n)=(22n+1/2)-1=22n-1=63,n=3.
Convert or Reduce Reduce 4,500 micrograms to grams
In how many ways 30 identical balls can be DISTRIBUTED among 4 boys?? Ans) Let they get a,b,c,d respectively. You requireto find the non negative integral results of a+b+c+d=3
if each tile with aside that measures one foot, how many tiles will be needed?
the sum of the interior angles of a convex rectilinear figure is equal to sum of the exterior angles. then the number of sides is
6 and 3/8 minus 1 and 3/4
On a piece of machinery, the centers of two pulleys are 3 feet apart, and the radius of each pulley is 6 inches. Determine the size of belt (in feet) is required to wrap around bot
1/2 + 2/8 =
32/562
1 1/3:2/3:1/6
you are driving on a freeway to a tour that is 500 kilometers from your home. after 30 minutes , you pass a freeway exit that you know is 50 kilometer from your home. assuming that
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