A high-yield string bean plant will produce, on average, at least 30 beans per week. Of 639 bean plants in a greenhouse, 426 plants produced less than 30 beans per week. What is the approximate probability that a randomly selected string bean plant will be a high-yield plant?

Between 12:00 PM and 1:00 PM, cars arrive at a bank's drive-thru at the rate of 18 cars per hour (0.3 car per minute). The following formula from statistics can be used to determine the probability that a car will arrive within \( t \) minutes of \( 12: 00 \) PM. Complete parts (a)-(c). \[ F(t)=1-e^{-0.3 t} \] (a) Determine how many minutes are needed for the probability to reach \( 30 \% \). About 1.19 minutes are needed for the probability to reach \( 30 \% \). (Round to two decimal places as needed.) (b) Determine how many minutes are needed for the probability to reach \( 90 \% \). About \( \square \) minutes are needed for the probability to reach \( 90 \% \). (Round to two decimal places as needed.)

Between 12:00 PM and 1:00 PM, cars arrive at a bank's drive-thru at the rate of 18 cars per hour ( 0.3 car per minute). The following formula from statistics can be used to determine the probability that a car will arrive within \( t \) minutes of 12:00 PM. Complete parts (a)-(c). F(t) \( =1-e^{-0.3 t} \) (a) Determine how many minutes are needed for the probability to reach 30\%. About \( \square \) minutes are needed for the probability to reach 30\%. (Round to two decimal places as needed.)

10. Se lanzan dos dados comunes. ¿Cuál es la Probabilidad de que: a) salgan dos números impares? b) la suma de los números sea menor a 9? c) uno sea par y el otro sea menor que 5 ? d) la suma sea 10 o el producto sea impar? e) el producto de los números sea número primo? f) la diferencia positiva sèa 3 o el màyor seà múltiplo del menor?

9. Se lanza un dado y sale 4 . ¿Qué probabilidad hay de que al lanzarlo de nuevo sume con el prim resultado un número menor que 9 ?

20. Entre los números \( 1 ; 2 ; 3 ; \ldots ; 50 \), se escoge un número al azar. ¿Cuál es la probabilidad de que el número escogido sea divisible por 6 u 8 ? a. 0,48 b. 0,36 c. 0,32 d. 0,24 e. 0,49