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Given, Number of white balls = 30 Let x be the number of black balls. Total number of balls in the bag = 30 + x Also, the probability of drawing a black ball from the bag is 1.4 times that of drawing a white ball. ⇒ x/ (30 + x) = 1.4[30/ (30 + x)] =5x = 7×30 ⇒ x = 42 Hence, the number of black balls in the bag = 42.
Kirti started walking towards South. After walking 100 meters she turned to her Left and walked 60 meters and took a left turn and walked 50 meter. Agai...
Namitha travels 14m in west direction, she turns right and travels 14m. Again, she turns towards left and travels 10m. Then, she turns again left and tr...
Urvashi walks 12 m north. Then she turns right and walks for 18 m, turns right and walks for 20 m, turns left and walks for 7 m, turns left and walks fo...
What is the total distance between point O and point K?
P and Q start from a point simultaneously. P moves to his west and travels 2 km and Q moves to his north and travels 2 km. P takes turn 90° anticlockwi...
N is in which direction with respect to R?
Office of O is to the south of office of N and office of M is to the north of office of O. In which direction office of M is located in respect of offi...
Babita starts from point J in west direction and walks 10 m to reach point K. From there, she takes a left turn and walks 7 m to reach point L. From poi...
What is the shortest distance between point M and point N?
Four of the following five are alike in a certain way and thus form a group. Which of the following does not belong to the group?
