[求助]涛涛的几道题,感谢ing~

alec911

Q6
            虽然选对了，为啥B不对呢？，是表示10个同时坏的几率吗？

A string of 10 lightbulbs is wired in such a way that if
            any individual lightbulb fails, the entire string fails. If for
            each individual lightbulb the probability of failing during time period T id 0.06, what is the probability that the string of lightbulbs will fail during time period T?

 

   A.0.06

   B.(0.06)^10

   C.1-(0.06)^10

   D.(0.94)^10

   E.1-(0.94)^10

Q10
            

The sides of a square region, measured to the nearest centimeter, are 6 centimeters long. The
            least possible value of the actual area of the
            square region is

A.36.00 sq cm

B.35.00 sq cm

C.33.75 sq cm

D.30.25 sq cm

E.25.00 sq cm

Q11
                

Of the three-digit positive integers that have no digits equal
            to zero, how many have two digits that are equal to each
            other and the remaining digit different from the other two?

A.     24

B.     36

C.     72

D.     144

E.     216

Q13

If the average (arithmetic mean) of the assessed values
            of x houses is $212,000 and the average of the assessed
            values of y other houses is $194,000, what is the average of the assessed values of the x+y houses?

 

(1)   x+y=36

(2)   x=2y

 

Q20.

Based on this year’s costs, an orcharde grower budgets P dollars for planting N new trees next year. If the average cost of planting each tree were to increase 25 percent from this year’s cost ,then the greatest number of trees that the orchard grower could plant next year using P dollars would be.

A.     20% less than N

B.     25%less than N

C.     equal to N

D.     20%greater than N

E.     25% greater than N

Q27.

If M is a positive integer, then M^3 has how many digits?

(1) M has 3 digits.

(2) M^2 has 5 digits

 

 

Q32.

Last year in a group of 30 businesses, 21 reported a net profit and 15 had investments in foreign markets. How many of the businesses
            did not report a net profit nor invest in foreign markets last year?

(1) last year 12 of the 30 businesses
            reported a net profit and had investments in foreign markets.

(2) last year 24 of the 30 businesses
            reported a net profit or invested in
            foreign markets, or both.

 

Q35.

Linda purchased 3 books at a book fair. What was the median price of the 3 books?

(1) The average (arithmetic mean) price of the 3 books was $1.5

(2) The price of one of the 3 books was $1.5

非常感谢各位，实在是搞不清楚这几道!

alec911

特别是第32题,一直不会这样的题型

有什么好方法去分析么??

alec911

没人好心帮下忙么？

fiona9179119

q35 median=1.5 choose both suffieicnt
q27 both not sufficient
q20 both sufficient
q11 choose e 9*8*3
q10 choose d  这题太bt了
q6 应该就是你的意思