A participant in a group discussion can be an effective speaker by remaining concise and speaking on the same level as the other participants so as not to confuse them. The participants can also ask for feedback and ask if they need to clarify anything so the listeners are able to get the most out of the discussion. A speaker should also always come prepared and bringing notes and guidelines. I hope I helped!
Answer:
Weight of silver coin = 29.25 units , weight of gold coin = 35.75 units
Explanation:
Let the weight of 1 gold coin be 
Weight of 1 silver coin be 
Total no of gold coins = 9
Total no of silver coins = 11
Total weight of gold coins = 9
Total weight of silver coins = 11
It is given that both weigh same thus we have

After replacing coins the weights become as under

Now it is given that gold stack weighs 13 unit less thus adding 13 units to gold stack gives it's weight equal to silver stack
the above relation modifies as


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