يلا نذاكر أحصاء سوآ ..

[عزتي مالها حـد]

^^^^
!!!!!!!

شكل الموضوع مغبررر !
المهم مو موضوعنا وين الناس !!؟

[صدى الأيام]

المشاركة الأصلية كتبت بواسطة moo0oog بنات عندي اربعه اسئله ممكن حلها اول سؤال The average age of Amtrak passenger train cars is 19.4 years. If the distribution of ages is normal and 20% of the cars are older than 22.8 years, find the standard deviation.

توجدي او المين وهو عباره عن 42+48/ 2 = 45
وبعدين تحلي معادلة كمجهول

من خلا هدا القانون z= x-µls

[حياتي بقربك]

ياليت أحد يحللي هذي المسائل ؟؟
The number of outcomes in the sample space for the gender of children
in a family with 7 children
is ...
A) 128 B) 64 C) 256 D) 32

Determine the number of all possible outcomes of guessing the last four digits in a telephone
number if repetition among the four digits is allowed.
A) 10000 B) 5040 C) 1000 D) 720

Ten thousand tickets are sold at 100 SAR each for a car valued at 45000 SAR. What is the expected
value of the gain if a person purchases two tickets?
A) -190 B) -150 C) -165 D) -191