Technoblade

So the first step is to find what is 1+2+3+4+...+199+200 you can do that by having pairs of 201 so there are 100 pairs and 201x100=20100 and so there are 20100 numbers in the list.

The second step is to find the sum

and the third step is to divide the sum by the umbers. Use these hints!

As ever,

Techno

Given is a quadratic xpression which is greater than equal to 0, thus, D = b^2-4ac <0
(2(4k-1))^2 - 4(15k^2-2k-7)<0
k^2-6k+8<0
(k-2)(k-4)<0
Thus, 2 or, k=3
 

;)

This question has already been answered here, https://web2.0calc.com/questions/probability_71218.

your question has been answered, I have attached a like below.

https://web2.0calc.com/questions/i-m-confused-about-this

P (Heads  ≥ 8 flips)  =  P( Tails ≤ 2 flips )  =

C(10,0)(1/2)^10   + C(10,1) (1/2)^10  + C(10,2)(1/2)^10  =  7 / 128
 

Techno the p*g.

I hope this is helpful

Techno the p*g