คณิตศาสตร์ มัธยมปลาย ประมาณ 3 ปีที่แล้ว

ช่วยด้วยยยย ต้องส่งพรุ่งนี้แล้วค่ะ;-;

5. Evaluate the following without using a calculato (a) lg (ln e) (c) log4 7+ log4 7 1 (e) 2 lg 5 += lg 16 2 log, 64 log, 32 (i) 1-= - lg 125 lg 2 3

คณิตศาสตร์ มัธยมปลาย มากกว่า 3 ปีที่แล้ว

ช่วยหน่อยค่ะ

1. How many ways can a committee of four be chosen from a group of thirty people? 2. How many ways can four singers be chosen from a group of twenty singers? 3. How many ways can a committee of three be chosen from a group of sixteen girls and fifteen boys if there must be exactly one girl and two boys on the committee? 4. How many ways can a student council be chosen from a class of thirty if there is one president and three council members? 5. How many different tickets are possible for the Lotto 6/49? (a ticket consists of six numbers from 1 to 49 without any repeats) 6. How many ways can a committee of five be chosen from a class of ten boys and eighteen girls if Ted and Thelma must be on the council? 3. How many different five card hands are possible? & How many different five card hands are possible with exactly three aces and two other cards? 9. How many different two card hands are possible with both cards being face cards? lo. How many different two card hands are possible with both cards being red cards? แ(. How many different two card hands are possible with both cards being black aces? เ2- How many different five card hands are possible with exactly four Kings and one other face card?