A construction company employs three sales engineers. Engineers 1,2 , and 3 estimate the costs of \( 15 \%, 25 \% \), and \( 60 \% \), respectively, of all jobs bid on by the company. For \( i=1,2,3 \), define \( E_{1} \) to be the event that a job is estimated by engineer \( i \). The following probabilities describe the rates at which the engineers make serious errors in estimating costs: \( P\left(\right. \) error \( \left.\mid E_{1}\right)=0.04, P\left(e r r o r \mid E_{2}\right)=0.03 \), and \( P\left(\right. \) error \( \left.\mid E_{3}\right)=0.02 \). Complete parts a through \( d \). c. If a particular bid results in a serious error in estimating job cost, what is the probability that the error was made by engineer 3 ? \( P\left(E_{3} \mid e r r o r\right)=\square \) (Round to the nearest thousandth as needed.) d. Based on the probabilities, given in parts a-c which engineer is most likely responsible for making the serious error?

Se tiene una urna con 7 Pelotas de color negra 8 de color blanco y a de color gris. ¿ cual es la pro bilidad de elegir al azar una pebta de color negro y una de color gris?

9.1 Given: \( P(A)=0,45 ; P(B)=y \) and \( P(A \) or \( B)=0,74 \). Determine the value(s) of \( y \) : 9.1.1 If \( A \) and \( B \) are mutually exclusive events. 9.1.2 If \( A \) and \( B \) are independent events.

Someone hands you a box of 13 chocolate-covered candies, telling you that 6 are vanilla creams and the rest are peanut butter. You pick candies at random and discover the first 3 you eat are all vanilla. Consider a result to be surprising if there is less than a \( 5 \% \) chance of observing it given your expectations. Complete parts a through c below. a) If there really were 6 vanilla and 7 peanut butter candies in the box, what is the probability that you would have picked 3 vanillas in a row? (Round to three decimal places as needed.)

A six-sided die is rolled. Let A be the event "getting an odd prime number". (1) Write down the set \( \mathrm{A}, \mathrm{n}(\mathrm{A}) \) and \( \mathrm{P}(\mathrm{A}) \). (2) Draw a Venn diagram showing the actual outcomes. (3) Draw a Venn diagram showing the number of outcomes. (4) Draw a Venn diagram showing the probabilities.

6) รหัสหนังสือของห้องสมุดแห่งหนึ่งประกอบด้วย ตัวอักษรภาษาอังกฤษ 2 ตัว เลขโดด 2 ตัว ที่ไม่เป็นศูนย์พร้อมกัน ตัวอักษร ภาษาอังกฤษ 1 ตัว และเลขโดด 1 ตัวที่ไม่เป็นศูนย์ เช่น \( A B 02 M 3 \) จงหาจำนวนรหัสที่เป็นไปได้ทั้งหมด 7) ถ้าทอดลูกเตำหนึ่งลูกสองครั้ง จงหาจำนวนวิธีที่แต้มที่ได้จากการทอดลูกเต๋าทั้งสองครั้งไม่เท่ากัน