1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ann [662]
2 years ago
9

A box contains 35 gems, of which 10 are real diamonds and 25 are fake diamonds. Gems are randomly taken out of the box, one at a

time without replacement. What is the probability that exactly 2 fakes are selected before the second real diamond is selected
Mathematics
1 answer:
Sonja [21]2 years ago
6 0

Answer:

Step-by-step explanation:

The total number of ways of selecting 3 gems of any kind without replacement is 35 * 34 * 33 = 39270

Now selecting 2 gems from 25 is 25C2

25 C 2 = 25 * 24/2 = 300

Selecting one good gem is 10

Total selection = 300 * 10 = 3000

P(gems) = 3000 / 39270

P(gems) = 300/3927

P(gems) = 100/1309

You might be interested in
Ken and Tami are making necklaces. Ken makes 25 necklaces. Tami makes m more necklaces then Ken. Which expression represents the
-BARSIC- [3]

Answer:

Step-by-step explanation

show the expression pls

7 0
3 years ago
Read 2 more answers
Find how many quarts of 6?% butterfat milk and 3?% butterfat milk should be mixed to yield 30 quarts of 5?% butterfat milk
Mrrafil [7]

Answer:

The 20  quarts are used for 6% butterfat milk and 10 quarts are used for  3% butterfat milk .

Step-by-step explanation:

As given

6% butterfat milk and 3% butterfat milk should be mixed to yield 30 quarts of 5% butterfat milk .

Let us assume that x quarts are used for 6% butterfat milk .

Than (30 - x) quarts are used for 3% butterfat milk .

6% is written in the decimal form

= \frac{6}{100}

= 0.06

3% is written in the decimal form

= \frac{3}{100}

= 0.03

5% is written in the decimal form

= \frac{5}{100}

= 0.05

Than the equation becomes

0.06 × x + (30 - x) × 0.03 = 30 × 0.05

0.06x + 0.9 - 0.03x = 1.5

0.06x  - 0.03x = 1.5 - 0.9

0.03x  = 0.6

x = \frac{0.6}{0.03}

x = 20 quarts for 6% butterfat milk  .

(30 - x ) = (30 - 20) = 10 quarts for 3% butterfat milk  .

Than 20  quarts are used for 6% butterfat milk and 10 quarts are used for  3% butterfat milk .




5 0
3 years ago
3 men painting a house take 7's
iVinArrow [24]

Answer:

21 days

Step-by-step explanation:

7 0
2 years ago
50 POINTS!!Different project management steps are initiating, planning, executing, monitoring and controlling, and closing a pro
garri49 [273]

Answer: Planning because you need to start somewhere if you dont then you dont have any of the other steps

Good luck lovie :)

8 0
2 years ago
HELLLLLLLLLLPPPPPPPPPPPPPPPP NO LINKS PLZZZZZZZZZZ
melisa1 [442]

Answer:

I cant see any pictures?

Step-by-step explanation:

7 0
3 years ago
Other questions:
  • Which shows 24+54 written using GCF and the distributive property
    15·2 answers
  • Find the value of x a. 2x=1/4 b. 4x=  -1/10
    6·2 answers
  • Find the distance between (-4, 5) and (4, 3)
    13·1 answer
  • Please help!!!! i confused
    11·1 answer
  • Solve the system of equations using substitution or graphing.
    10·2 answers
  • ANSWER PLEASE i need help i will mark brainliest
    12·1 answer
  • Jada has 18 Fruit by the Foot snacks. She and her 4 friends are going to share them all so that all 5 people get
    13·2 answers
  • Stop giving me the same answer!!!!!
    8·1 answer
  • What is the area of the blue rectangle at the top of the grid?
    15·1 answer
  • What is the distance between the points (-6, 2) and (-4, 7)? Round to the nearest tenth if necessary.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!