Question
A box has โxโ blue balls and 9 yellow balls. If the
probability of selecting a blue ball is 3/7, then find the probability of drawing two balls of different colours.Solution
ATQ, Total balls = x + 9 So, x/(x + 9) = 3/7 Or, 7x = 3x + 27 So, x = 27/4 = 6.75 (not possible as balls are integers, so x = 7 approx) Thus, x = 7 Desired Probability = (7C1 ร 9C1)/(16C2) = (2 ร 7 ร 9)/(16 ร 15) = 21/40
In rose pruning time in rose growing area is -
Which of the following is a direct method of weed control involving the mechanical destruction or physical removal of weeds?
For the purpose of general long-term storage, the recommended temperature range for potatoes is:
Which device is used to measure the moisture content of the soil/media automatically?
What are the standard ingredients found in a common potting mix?
By definition, what is the primary purpose of a nursery?
In agronomic terms, which crop is identified as a โcatch cropโ typically grown to utilize residual soil moisture or prevent nutrient leaching?
Artificial lighting used to extend day length is called:
Vermiculite is created by the industrial heat-processing of:
The โsuckersโ used for propagation of tuberose originate from which part of the plant?