We take 2 marbles from 20 marbles and the total ways is 20x19:2=190
But we need only 2 red marbles and the ways is 14x13:2=91
And finally we do the division 91:190=91/190 is the probability we need
Answer:
Sí, 7 es un número natural
Step-by-step explanation:
Answer:B
Step-by-step explanation:
Answer:
7
Step-by-step explanation:
3^2 = 9
(-4)^2 = 16
16-9= 7
Answer:
-10
Step-by-step explanation: