[woudi]

بسم الله الرحمن الرحيم
سلاآآآآآآآآآآآآم
كيفكم وكيف الاحصاء معاكم ؟؟
لوسمحتو عندي كم سؤال ماعرفت احلو بليييز اللي يعرف طريقة الحل يساعدني

A committee of 4 people is to be formed from 6 doctors and 8 engineers. Find the probability
that the committee will consist of at least two doctors.

A) 0.41
B) 0.83
C) 0.59
D) 0.17

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A box contains 3 red balls and 5 black balls. 4 balls are selected with replacement. The standerd
deviation of the number of red balls that will be obtained is

A) 0.968
B) 4
C) 0.938
D) 5

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A die is rolled 5 times. the probability of getting a number 4one time only is

A) 0.015
B) 0.386
C) 0.167
D) 0.402

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The time T

1 to travel from A to B through city center (road R1) is normally distributed with mean

20 minutes and standard deviation 5 minutes. The time T2 to travel from A to B through a new

ring road (road R2) is normally distributed with mean 15 minutes and standard deviation 8
minutes. You have 17 minutes to travel from A to B on an important appointment. Using this
information, solve the following three questions

. P (T2 > 17)

A) 0.4013

B) 0.5987
C) 0.9013
D) 0.0987

. P (T1 > 17)

0.2257 A)

B) 0.2743
C) 0.7743
D) 0.7257

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Let X be a normally distributed random variable with mean 100 and a standard deviation 10. Use
this information to find the value of a in the following two
questions such that

p(95<x<a=0.6309

A101.5)
B) 15.5
C) 115.5
D) 84.5

P (X > a) = 0.0427

A) 82.8
B) 117.2
C) 101.72
D) 17.2

هادي هي الأسئلة بليييييييز اللي يعرف الحل يساعدنيي
ومرررة شكرااااااا
والله يوفق الجميييييييييع