Answer:
-1
Step-by-step explanation:
x+x+2x=-2-2
4x=-4
x=-1
Answer:
18
Step-by-step explanation:
(must round down for population)
Answer:8.8317687
Step-by-step explanation:
To find the square root of 78
We gets
√78=8.83176087
Answer:
Should be 10 if there is nothing for th stem value of 3.
Step-by-step explanation:
The stem is the tens place, and the leaf is the ones. You would get 28 40 43 43 45 50 50 for your numbers. If you take Q3-Q1, you get your answer, 10.
Answer:

Step-by-step explanation:
3 envelopes having 2 red card
2 envelopes having 1 red card and 1 black card
1 envelope having 2 black cards
We are given that . An envelope is selected at random and a card is withdrawn and found to be red.
So, No. of ways of envelope having red card = 3+2 = 5
No. of required ways of envelope having 1 red card and 1 black card = 2
So, probability of getting an envelope having 1 red card and 1 black card = 
Hence The chance the other card is black is 