If the bird were just guessing there would be two options (right or wrong) and we would expect them to be equally likely to occur (50% chance for each). A 50% of correct, out of 12 cards gives us:
12×0.50=6
If the bird was guessing we would expect 6 correct answers. (1/2 of the total correct and 1/2 wrong.)
So the answer would be 6.
18(2a-b)-4(2a-b)-13
=36a-18b-8a+4b-13
Rearrange
=36a-8a-18b+4b-13
=28a-14b-13
I have 81¥ and I'm going to the US, so I need to convert my Yen into US Dollars, if i get 1 USD (US Dollar) for every 9¥, how many USD will i have if i convert all of my Yen?
Answer:
Could you rewrite this question in english so we can understand what is being asked? Thank you!
Step-by-step explanation:
