Question

. In a certain disable centre, 90% disabled were blind and 20% disabled were deaf. Find the percentage of disabled (i) only deaf (ii) only blind (iii) both .

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Answer 1

The percentage of disabled individuals in the centre who are only deaf is at least 10%, only blind is at least 80%, and both blind and deaf could be up to 10%, assuming some individuals count in both categories and no other disabilities are considered.

Step-by-step explanation:

The question involves calculating percentages of disabled individuals in a centre who are only deaf, only blind, and those who are both deaf and blind. To determine these percentages, it's crucial to consider that some individuals could be counted in both the blind and deaf categories. If we assume that the centre does not serve individuals with other disabilities, then we can consider the percentages as follows:

• 90% of individuals are blind.
• 20% of individuals are deaf.

Since these two categories can overlap, we could potentially have up to 10% of individuals who are both blind and deaf (if all who are deaf are also blind).

To calculate the percentages:

1. Only deaf: We start with the 20% deaf figure and subtract the percentage of those who are both, which could be up to 10%, leaving us with at least 10% who could be only deaf.
2. Only blind: We start with the 90% blind figure and subtract the percentage of those who are both, which could also be as high as 10%, leaving us with at least 80% who could be only blind.
3. Both blind and deaf: This category could potentially include up to 10% of the individuals, assuming the overlap is complete.

It's important to note that the actual percentage of individuals who are both could be any number from 0% to 10%.