En una bolsa se colocan 8 bolas rojas, 3 blancas y cuatro negras. Se elige una bola al azar y luego sin reposición, se elige otra. ¿calcular la probabilidad de que la primera sea roja y la segunda negra?

for a it would be 24 children.

for b i don't understand the question. is it saying for each individual person they pick 5 reds to 7 greens or is it the whole group. clarify and i hope this can you.

step-by-step explanation:

= 5

step-by-step explanation:

to find the 15th term substitute n = 15 into the nth term formula

= (- 3 × 15 ) + 50 = - 45 + 50 = 5