[عبير الفيفي]

السلام
عندي 3 اسئلة ماعرفت احلها
إذا ممكن تحلوها لي
مع الشرح
وشكرا

1/ Predict the number of hours a person exercises per week when his age is 50 years.



2/
How many 3-digit passwords are possible if digits can be repeated?



3/ An ID card consists of 2 letters followed by 3 digits .How many different ID cards can be made if repetitions are allowed in the letters but not in the digits ?