Hlo guys who is very good in mathematics plzz help!!!!!! Class9 maths chapter(PROBABILITY) question........PLZ GUYS I NEED UR HELP!! Who knows well that guys only slove the answer...... others not!!! Not that silly answers!!!!! Correct answer= thanks, mark as brainlist and vote execellent!!!
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Answered by
1
Answer:
number of red balls = x
0.3 = x/(x + 7)
0.3(x + 7) = x
0.3x + 2.1 = x
0.3x - x = - 2.1
- 0.7x = - 2.1
x = 3
Answered by
1
Answer:
ans = 3/10
Step-by-step explanation:
this is according of probability formula
formula:-P(A)= No. of favourable Outcome /
total no. of event in the sample space
i hope it help u
and you can see this formula in your maths book
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