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There are 87 balls in a jar. Each ball is painted with at least one of two colors, red or green. It is observed that 2/7 of the balls that have red color also have green color, while 3/7 of the balls that have green color also have red color. what fraction of the balls in the jar has both red and green colors?

Correct Answer: 6/29
এখানে একটি Jar এ 87 টি বল আছে। প্রতিটি বলে red অথবা green এই দুটি color - এর অন্তত একটি পাওয়া যাবে। আবার red color বলের 27 অংশে green color ও আছে। 7 টি বলে 2 টি বল Boty color মানে (Red + Green)।বের করতে হবে মোট বলের কত অংশ red এবং green উভয় color আছে? ধরি, উভয় এর সংখ্যা উভয় color বল x হলে red color বল হবে 7x2 টি " " " " " green " " 7x3 " Total = Red + green - both 87 = 7x2 + 7x3⇒87 = 21x + 14x - 6x6⇒87 = 29x6⇒3 = x6∴x = 18So,the fraction = 1887 = 629

Below is the list of colors nominated as the favorite colors by students of class I. Determine the color which has frequency 9. red, blue, red, yellow, green, yellow, green, yellow, yellow, red, green, red, blue, red, yellow, red, blue, yellow, red, blue, blue, yellow, yellow, green, green

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In a bag the ratio of red balls to green balls is 4 : 9. If 6 more green balls were added to the bag, the ratio of red balls to green balls would become 1 : 3. How many red balls are there in the bag?

In a bag, the ratio of red balls to green balls is 4:9. If 7 more red balls are added to the bag, the ratio of red balls to green balls will become 5:6. How many green balls are there in the bag?

Two bags A and B have equal number of bails. Bag A has 20% red balls and 80% green bails. Bag B has 30% red bails. 60% green balls and 10% yellow balls. Contents of Bags A and B are mixed thoroughly and a ball is randomly picked from the mixture. What is the chance that the ball picked is red?

In a bag which contains 40 balls, there are 18 red balls and some green and blue balls. If two balls are picked up from the bag without replacement, then the probability of the first ball being red and second being green is 3/26. Find the number of blue balls in the bag.

A Jar contains white, red and green marbles in the ratios 2: 3: 4. Five more green balls are added to the Jar and the ratios become 2: 3: 5. How many white balls are there in the Jar?