展开全部

题目列表

题目内容
There are 7 balls in a box, among which 1 is red. Someone removes balls from the box one by one without replacement and stops until he or she removes the red ball.

Quantity A

The probability that he or she stops after the third removal

Quantity B

The probability that he or she stops after the fourth removal


Rodrigo's locker number has 3 different digits, the sum of which is 12. The sum of any two digits in the number is less than 10, and the digits are in decreasing order from left to right. What is Rodrigo's locker number?
Which of the following CANNOT be the sum of 6 consecutive odd integers?
$$P=23^{25}$$-23

What is the units digit of P?

Quantity A

The remainder when $$2^{32}$$ is divided by 3

Quantity B

1


What is the remainder when $$(345,606)^{2}$$ is divided by 20?
n is a positive integer.

Quantity A

The remainder when 5($$10^{n}$$) + 1 is divided by 3

Quantity B

1


Quantity A

$$(2m+1)^{2}$$

Quantity B

$$(2(m+1))^{2}$$


x is a negative integer

Quantity A

$$(2^x)^2$$

Quantity B

$$(x^2)^x$$


$$p$$, $$s$$, and $$t$$ are probabilities and $$0 \lt p \lt s \lt t$$.

Quantity A

$$p+st$$

Quantity B

$$s(p+t)$$


x ≥ 0

Quantity A

$$2^{x}$$+$$2^{x}$$+$$2^{x}$$+$$2^{x}$$

Quantity B

$$4^{x}$$+$$4^{x}$$



PQ=QR=QS

Quantity A

PS

Quantity B

RS



If the area of the region is 5880, then what is the perimeter of the region? (All the angles shown above are right angles)
Of the people surveyed about the effectiveness of various treatments for insomnia, 65 percent reported that prescription drugs were effective and 48 percent reported that exercise was effective. If 22 percent of those surveyed reported that prescription drugs were effective but did not report that exercise was effective,what percent of those surveyed reported that exercise was effective but did not report that prescription drugs were effective?

_____%
$$a_{1}$$, $$a_{2}$$, $$a_{3}$$,..........., $$a_{n}$$,.............

A sequence of numbers as shown above is defined by $$a_{n}=a_{n-1}-a_{n-2}$$ for n > 2. If $$a_{1}=-5$$, and $$a_{2}=4$$, what is the sum of the first 100 terms of the sequence?

Quantity A

14!

Quantity B

15!-14!




The boxplot above summarizes a list of 240 numbers. Which of the following statements must be true?

Indicate all such expressions.
Set A={22, 23, 24, 25, 26, 27}
Set B={222, 223, 224, 225, 226, 227}

Quantity A

The standard deviation of integers in Set A

Quantity B

The standard deviation of integers in Set B


Al, Ben, Carl, Dina, and Edna are to be seated in a row of 5 adjoining chairs, with 1 person sitting in each chair. If Dina and Edna must each be seated in the first chair in the row or the last chair in the row, in how many different seating arrangements can the 5 people be seated?
Two companies, $$C_1$$, and $$C_2$$, are participating in a fund-raising activity along with 8 other companies. Of the 10 companies, a group of 4 companies will be chosen to receive an award. Of all the possible choices of groups of 4 companies that will receive an award, how many choices include both companies $$C_1$$ and $$C_2$$?

共收录:

25000 +道题目

199本备考书籍

最新提问