31. En un avianı, el \( 50 \% \) de las aves son loros y el \( 40 \% \) de los loros tienen tonos azules en su plumaje. Si se observa un ave al azar en ese aviario, ¿cuál es la probabilidad de que sea un toro con tonos azules en su plumaje? A \( 10 \% \) B \( 20 \% \) C \( 40 \% \) D \( 90 \% \) D

In how many ways can the digits in the number \( 7,441,111 \) be arranged?

3. In a class of 100 students 75 are boys and 25 are girls. The chance that a boy gets a first class is 0.25 and the probability that a girl first class is 0.21 . find the probability that a student selected at random gets a first class. ( 3 marks )

Question 10, 11.2.47 At a benefit concert, nine bands have volunteered to perform but there is only enough time for six of the bands to play. How many lineups are possible?

What is the probability of rolling a 1 or a 4 on a number cube labeled 1 through 6 ? B. \( \frac{1}{6} \) D. \( \frac{1}{3} \) E. \( \frac{1}{2} \) E. \( \frac{5}{6} \)

In how many distinct ways can the letters of the word BELLE be arranged? 0 of 1